4.793.283 resultados, 29.450.556 comentarios, 1.037.175 imágenes, 80.044 vídeos, 86.434 noticias
TODO ESPAÑA TOP EUROPA AMÉRICA ASIA Y OCEANÍA ÁFRICA EN TELEVISIÓN API

Estadísticas 2025/2026

Competición Comp Equipo Eq. PJ PT PC PS
Liga Bosnia-Herzegovina Liga Bosnia-Herzegovina Rudar Prijedor Rudar Prijedor 13 12 3 1 1007' 2 - - 3 -

Ficha de M. Ritzmaier

Nombre
M. Ritzmaier
Completo
Marcel Ritzmaier
Edad
33 años
Fecha de nacimiento
22-04-1993
Lugar de nacimiento
at Knittelfeld
País
at Austria
Nacionalidad
Austria
Demarcación
Centrocampista
Altura
180 cm
Peso
75 kilogramos
Nombre
Marcel
Apellidos
Ritzmaier

Últimos partidos jugados por M. Ritzmaier 

partido: Array
(
    [match_id] => 15903
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 9988
    [mid] => 15903
    [r1] => 2
    [r2] => 4
    [shedule] => 2026-05-09 18:30:00
    [team1] => 6697107
    [team2] => 6697115
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Sarajevo
    [basealias1] => Rudar-Prijedor
    [basealias2] => Sarajevo
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1778350989
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 74
    [stats] => Array
        (
            [min] => 74
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15899
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 59654
    [mid] => 15899
    [r1] => 3
    [r2] => 2
    [shedule] => 2026-05-02 16:00:00
    [team1] => 6697107
    [team2] => 6697109
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Posušje
    [basealias1] => Rudar-Prijedor
    [basealias2] => Posusje
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1777737192
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 88
    [stats] => Array
        (
            [min] => 88
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 2
        )

    [taa] => 0
    [assis] => 2
)

partido: Array
(
    [match_id] => 15893
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 9986
    [datateam2] => 5850
    [mid] => 15893
    [r1] => 1
    [r2] => 0
    [shedule] => 2026-04-25 18:30:00
    [team1] => 6697113
    [team2] => 6697107
    [id] => 79762
    [nameShow1] => Radnik Bijeljina
    [nameShow2] => Rudar Prijedor
    [basealias1] => Radnik-Bijeljina
    [basealias2] => Rudar-Prijedor
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 9986
    [stadium_name] => Gradski stadion (Bijeljina)
    [stadium_size] => 105 x 96 m
    [stadium_seats] => 6000
    [stadium_id] => 1857
    [stadium_yearBuilt] => 1954
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1777141450
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 32
    [stats] => Array
        (
            [min] => 32
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15887
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 4676
    [mid] => 15887
    [r1] => 0
    [r2] => 1
    [shedule] => 2026-04-21 18:00:00
    [team1] => 6697107
    [team2] => 6697112
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Željeznicar
    [basealias1] => Rudar-Prijedor
    [basealias2] => Zeljeznicar
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1776794109
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 90
    [stats] => Array
        (
            [min] => 90
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15883
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 4024
    [datateam2] => 5850
    [mid] => 15883
    [r1] => 0
    [r2] => 1
    [shedule] => 2026-04-17 18:00:00
    [team1] => 6697108
    [team2] => 6697107
    [id] => 79762
    [nameShow1] => Siroki Brijeg
    [nameShow2] => Rudar Prijedor
    [basealias1] => Siroki-Brijeg
    [basealias2] => Rudar-Prijedor
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 4024
    [stadium_name] => Pecara Stadium
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 10000
    [stadium_id] => 1130
    [stadium_yearBuilt] => 1953
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1776448329
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 1
    [tr] => 0
    [min] => 93
    [stats] => Array
        (
            [min] => 93
            [goals] => 0
            [ta] => 1
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15878
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 5847
    [mid] => 15878
    [r1] => 0
    [r2] => 2
    [shedule] => 2026-04-10 20:30:00
    [team1] => 6697107
    [team2] => 6697106
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Borac Banja Luka
    [basealias1] => Rudar-Prijedor
    [basealias2] => Borac-Banja-Luka
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1775852591
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 90
    [stats] => Array
        (
            [min] => 90
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15873
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 13139
    [mid] => 15873
    [r1] => 3
    [r2] => 1
    [shedule] => 2026-04-03 20:30:00
    [team1] => 6697107
    [team2] => 6697110
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Sloga Meridian
    [basealias1] => Rudar-Prijedor
    [basealias2] => Sloga-Doboj
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1775247790
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 90
    [stats] => Array
        (
            [min] => 90
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 1
        )

    [taa] => 0
    [assis] => 1
)

partido: Array
(
    [match_id] => 15865
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 4014
    [datateam2] => 5850
    [mid] => 15865
    [r1] => 1
    [r2] => 0
    [shedule] => 2026-03-22 17:30:00
    [team1] => 6697114
    [team2] => 6697107
    [id] => 79762
    [nameShow1] => Zrinjski Mostar
    [nameShow2] => Rudar Prijedor
    [basealias1] => Zrinjski
    [basealias2] => Rudar-Prijedor
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 4014
    [stadium_name] => Bijeli Brijeg
    [stadium_size] => 105 x 70
    [stadium_seats] => 25000
    [stadium_id] => 1046
    [stadium_yearBuilt] => 1971
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1774203909
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 82
    [stats] => Array
        (
            [min] => 82
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15863
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 17005
    [mid] => 15863
    [r1] => 1
    [r2] => 2
    [shedule] => 2026-03-15 20:00:00
    [team1] => 6697107
    [team2] => 6697111
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Velež Mostar
    [basealias1] => Rudar-Prijedor
    [basealias2] => Velez-Ba
    [totalcomments] => 1
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1773607990
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 1
    [tr] => 0
    [min] => 75
    [stats] => Array
        (
            [min] => 75
            [goals] => 0
            [ta] => 1
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15857
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 9988
    [datateam2] => 5850
    [mid] => 15857
    [r1] => 2
    [r2] => 2
    [shedule] => 2026-03-07 15:00:00
    [team1] => 6697115
    [team2] => 6697107
    [id] => 79762
    [nameShow1] => Sarajevo
    [nameShow2] => Rudar Prijedor
    [basealias1] => Sarajevo
    [basealias2] => Rudar-Prijedor
    [totalcomments] => 1
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 9988
    [stadium_name] => Olimpijski Stadion Asim Ferhatović Hase
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 35630
    [stadium_id] => 586
    [stadium_yearBuilt] => 1947
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1772899092
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 66
    [stats] => Array
        (
            [min] => 66
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15849
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 5850
    [datateam2] => 9986
    [mid] => 15849
    [r1] => 0
    [r2] => 0
    [shedule] => 2026-02-21 16:00:00
    [team1] => 6697107
    [team2] => 6697113
    [id] => 79762
    [nameShow1] => Rudar Prijedor
    [nameShow2] => Radnik Bijeljina
    [basealias1] => Rudar-Prijedor
    [basealias2] => Radnik-Bijeljina
    [totalcomments] => 0
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 5850
    [stadium_name] => Gradski Stadion Prijedor
    [stadium_size] => 105 x 68 m
    [stadium_seats] => 3540
    [stadium_id] => 2406
    [stadium_yearBuilt] => 1952
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1771693511
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 69
    [stats] => Array
        (
            [min] => 69
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)

partido: Array
(
    [match_id] => 15840
    [league_id] => 79762
    [logo] => bosnia
    [name] => Liga Bosnia-Herzegovina
    [group_code] => 1
    [acta] => 0
    [isVideo] => 0
    [year] => 2026
    [coefficient] => 18.437
    [extra] => 0
    [datateam1] => 4676
    [datateam2] => 5850
    [mid] => 15840
    [r1] => 0
    [r2] => 3
    [shedule] => 2026-02-16 18:00:00
    [team1] => 6697112
    [team2] => 6697107
    [id] => 79762
    [nameShow1] => Željeznicar
    [nameShow2] => Rudar Prijedor
    [basealias1] => Zeljeznicar
    [basealias2] => Rudar-Prijedor
    [totalcomments] => 18
    [betId] => 0
    [penaltis1] => 99
    [penaltis2] => 99
    [prorroga] => 0
    [status] => 4
    [minute] => 90
    [finished] => 1
    [stadium_team_id] => 4676
    [stadium_name] => Stadion Grbavica
    [stadium_size] => 105 x 66 m
    [stadium_seats] => 16100
    [stadium_id] => 1209
    [stadium_yearBuilt] => 1953
    [match_time] => 
    [first_half_time] => 
    [second_half_time] => 
    [second_half_stop] => 1771267868
    [second_half_extra_stop] => 
    [goals] => 0
    [ta] => 0
    [tr] => 0
    [min] => 91
    [stats] => Array
        (
            [min] => 91
            [goals] => 0
            [ta] => 0
            [taa] => 0
            [tr] => 0
            [assis] => 0
        )

    [taa] => 0
    [assis] => 0
)
premier Sab 09 May 2026
18:30 Finalizado 		Rudar Prijedor Rudar Prijedor
2-4
 Sarajevo Sarajevo 74'
premier Sab 02 May 2026
16:00 Finalizado 		Rudar Prijedor Rudar Prijedor
3-2
 Posušje Posušje 88' 2
premier Sab 25 Abr 2026
18:30 Finalizado 		Radnik Bijeljina Radnik Bijeljina
1-0
 Rudar Prijedor Rudar Prijedor 32'
premier Mar 21 Abr 2026
18:00 Finalizado 		Rudar Prijedor Rudar Prijedor
0-1
 Željeznicar Željeznicar 90'
premier Vie 17 Abr 2026
18:00 Finalizado 		Siroki Brijeg Siroki Brijeg
0-1
 Rudar Prijedor Rudar Prijedor 93'
premier Vie 10 Abr 2026
20:30 Finalizado 		Rudar Prijedor Rudar Prijedor
0-2
 Borac Banja Luka Borac Banja Luka 90'
premier Vie 03 Abr 2026
20:30 Finalizado 		Rudar Prijedor Rudar Prijedor
3-1
 Sloga Meridian Sloga Meridian 90' 1
premier Dom 22 Mar 2026
17:30 Finalizado 		Zrinjski Mostar Zrinjski Mostar
1-0
 Rudar Prijedor Rudar Prijedor 82'
premier Dom 15 Mar 2026
20:00 Finalizado 		Rudar Prijedor Rudar Prijedor
1-2
 Velež Mostar Velež Mostar 75'
premier Sab 07 Mar 2026
15:00 Finalizado 		Sarajevo Sarajevo
2-2
 Rudar Prijedor Rudar Prijedor 66'
premier Sab 21 Feb 2026
16:00 Finalizado 		Rudar Prijedor Rudar Prijedor
0-0
 Radnik Bijeljina Radnik Bijeljina 69'
premier Lun 16 Feb 2026
18:00 Finalizado 		Željeznicar Željeznicar
0-3
 Rudar Prijedor Rudar Prijedor 91'

Compañeros de equipo

Competiciones Populares

Ligas

36/38 Ahora

es Primera División

36/38 Ahora

gb Premier League

36/38 Ahora

it Serie A

40/42 Ahora

es Segunda División

2 grupos Ahora

es Primera Federación

16/38 Ahora

br Brasileirão Betano

28/30 Ahora

es Primera Femenina

16 grupos Ahora

and Primera Andaluza

17 grupos Ahora

es Liga Nacional

Competiciones

5/5 Ahora

ue Champions League

5/5 Ahora

ue Europa League

5/5 Ahora

ue Conference League

8 grupos Ahora

n2 Copa Libertadores

9 grupos Ahora

ue Clasificación Europeo U21

8 grupos Ahora

n2 Conmebol Sudamericana

3 grupos Ahora

wo Clasificación Mundial Eu.

350/365 Ahora

wo Amistosos Selecciones

1/3 Ahora

es Tercera Federación - Pla.

4/4 Ahora

ue Champions League Femenina

3 grupos Ahora

o1 OFC Pro League

3/3 Ahora

be Liga Belga - PlayOff Asc.

2 grupos Ahora

ue Clasificación Europeo U19

3 grupos Ahora

ue Clasificación Europeo U17

5/12 Ahora

wo Amistosos Selecciones U17

5/12 Ahora

wo Amistosos Selecciones U18

5/12 Ahora

wo Amistosos Selecciones U16

4 grupos Ahora

a2 Copa África U17

No hay ligas

Ligas

29/30 Ahora

ru Premier League Rusia

34/34 Ahora

tr Liga Turca

4 grupos Ahora

gr Super League Griega

3 grupos Ahora

ss Liga Escocia

12/30 Ahora

cn Superliga China

13/35 Ahora

us MLS - Liga USA

12/30 Ahora

cl Primera Chile

7/30 Ahora

se Liga Sueca

4 grupos Ahora

be Liga Belga

3 grupos Ahora

ch Liga Suiza

4 grupos Ahora

cz Liga Checa

3 grupos Ahora

ro Liga Rumana

12/18 Ahora

jp Liga Japonesa J1

3 grupos Ahora

at Bundesliga Austria

35/36 Ahora

hr Liga Croata HNL

2 grupos Ahora

uy Torneo Intermedio Uruguay

33/33 Ahora

hu Liga Hungría

33/34 Ahora

pl Liga Polaca

28/30 Ahora

ua Liga Ucraniana

3 grupos Ahora

dk Superliga Danesa