Goalkeepers usually have the right to punch crosses and shots away.
But when it comes to the other players, they are best advised to keep their fists to themselves.
But it was a different matter on Wednesday night when Tavriya Simferopol beat Vorskla Poltava 3 - 2 in a pulsating Ukrainian Cup tie.
Tension spilled over at the final whistle when Tavriya keeper Serhiy Pohorilyi squared up to Artem Hromov.
And the shot-stopper showed his superior reflexes as he got his punch in first, smacking Hromov across the face and earning himself a red card.