Portugal striker Cristiano Ronaldo had his nose smashed in the first half.
The striker collided with the Czech goalkeeper Tomas Vaclik in the fight for the riding ball.
Ronaldo's nose bleeds.
He was given first aid.
The score in the match, which takes place in Prague, after the first half is 2:0 in favor of the Portuguese.
The goals were scored by Diogo Dalo (33rd minute), Bruno Fernandes (45th).
Earlier, the Ukrainian national team scored five unanswered goals to the Armenian national team in the League of Nations match.