Ostrák started his youth career with Czech club MFK Frýdek-Místek, before joining 1. FC Köln’s academy in 2016. After impressing in FC Köln’s youth ranks, he was given the opportunity to practice with the club’s first team in January 2019. At the end of that season, he was loaned to TSV Hartberg in the Austrian Bundesliga before making a move to MFK Karviná in his home country Czech Republic.
Following his loan spells, he was recalled to 1. FC Köln’s first team and capped his Bundesliga debut with a stunning performance after coming off the bench to provide an assist in Köln’s 2-1 home win against VfL Bochum.
Ostrák played a huge role on the Czech Republic National Youth Team and showcased his flexibility by playing in multiple midfield positions. He has represented his country at the U21 (9 caps), U20 (2 caps), U19 (7 caps), U18 (3 caps), and U17 (7 caps) levels.
