Not a Word about Football (1973)

Thirteen year old Slavik has always wanted to play football, but in order to play on the children's team he lies and pretends to be 12 years old. When they win, his life could not be better. But when his little sister finds out what he's done and threatens to send a letter to the losing team, his deception is revealed.

Unfortunately the movie Not a Word about Football is not yet available on HBO Max.