The Ballon d'Or holder was thrust back into the startng lineup in the win over Bayern Munich but says he felt ready after three weeks out.
The Portugal international has not featured since the Blancos' 3-0 home leg win over Borussia Dortmund in the quarterfinal - exactly three weeks prior to his start at Santiago Bernabeu against the European champions.
He played a key part in Karim Benzema's goal which allowed Carlo Ancelotti's men to defeat die Roten 1-0 in the semifinal first leg and the Ballon d'Or holder was delighted with the result ahead of next Tuesday's return at the Allianz Arena.
"I was afraid - it was my first match after three weeks out," he told reporters after the game. "Some people didn't want me to play and some people did. I felt well and ready for the next few games.
"One-nil is a good result. We have a good advantage and if we score next week it will be so difficult for them to qualify for the final.
"The second leg will be a tense match. We have a little advantage so let's see if that is enough."
Madrid will now temporarily turn its attention to La Liga, as the side prepare to hosts Osasuna on Saturday as it looks to close the gap to leader Atletico Madrid.