The 37-year-old sustained the injuries during a collision with Czech Republic goalkeeper Tomas Vaclik.
Advertisement
During the 4-0 victory on Saturday, Ronaldo could be seen with blood pouring down his face.
He did manage to play the full 90 minutes, though, and was able to train with the rest of his teammates, despite showing signs of the clash.
Advertisement
Vaclik's arms ended up smashing into Ronaldo's face, as the Olympiacos shot-stopper went to claim the ball.
After being treated by the Portugal medical staff, the six-time Ballon d'Or winner would later give away a penalty.
Czech striker Patrik Schick stepped up to take the spot-kick only for him to miss.
Portugal managed to win the match with Diogo Dalot netting a brace, either side of a Bruno Fernandes strike.
Advertisement
Advertisement
Liverpool striker Diogo Jota added a fourth late on to round off the 4-0 victory.
Ronaldo, despite his knock, is likely to spearhead Portugal's attack when his side face Spain in the Iberian derby in Braga on Tuesday.
The Nations League match will decide Group B, and will be the last before the World Cup in Qatar.
Advertisement
Portugal must avoid defeat in their final group match against Spain to reach the semi-finals of the Nations League.