Career
Biri played as a goalkeeper for a number of clubs, most notably Padova and MTK Budapest Football Club, also representing Hungary in the 1924 Summer Olympics. However, he is best known for his coaching career in Portugal which spanned 31 years. Born in Budapest, Biri career in football started in a hometown club, Kispest Air Corps at the age of 22.
His performances earned him a place in the Hungary squad for the 1924 Summer Olympics.
In 1925, he moved to Italy, representing Padova in the early days of what was to known as Serie A. After two seasons in Italy, he returned back to Hungary, passing through several teams, without much success, having short spells in France and Portugal, retiring in 1936, at age 35. Shortly after, Biri started coaching, winning Campeonato de and coming runner-up in Primeira Liga in his only season there.
After a brief spell Académico, he was then hired by "s President Augusto da Fonseca Júnior. In the 8 seasons he spent there, he successfully challenged Sporting dominance, claiming 3 Primeira Liga titles and 3 Taça de Portugal.
However, he still has the highest winning percentage of any other coach with at least 100 games and the second longest reign with 8 years, after Cosme Damião.
After, János managed eleven other teams, retiring as coach in 1966, after more than 30 years in managerial roles. Campeonato do: 1935-1936.