[5] In 1920 Čapek had a short spell in the Kingdom of Yugoslavia playing with FK Vojvodina,[6] a club with traditional connection with Slavia Prague.
He returned to Slavia and stayed until 1928, winning the first edition of the Czechoslovak First League with them in 1925.
[7] In 1927 he moved to another Czechoslovak First League club, SK Kladno, where he played until 1931.
[4] He represented the Czechoslovakia national team on seven occasions, scoring eight goals.
[10] Two days later a second match was played against Switzerland with Čapek being an unused substitute and ending with Czechoslovakia losing 0–1.