Real moved into the Champions League quarter-finals as they beat Ligue 1 leaders Paris St-Germain at Parc des Princes.
Ronaldo scored twice in the first leg at home, which Real won 3-1, and he headed in from Lucas Vazquez's cross to extend Real's lead in France.
But Casemiro's heavily deflected strike sealed Real's victory.
Real coach Zinedine Zidane stated: "Congratulate the players, they made a good and serious match from the beginning, it was important to make a game like that, we won at a very difficult field, also the first leg, we are satisfied and happy.
"The team is as always, having all available, I have chosen the first eleven, it has gone well, those who came in.
"We passed the tie and we are happy, we will try to continue this in the League."