Cristiano Ronaldo admitted he felt emotional after putting his old club out of the Champions League.
Ronaldo scored the winner in the 2-1 win over 10-man Manchester United -- his first return to Old Trafford since he left the club in 2009 -- to put Real Madrid into the quarterfinals 3-2 on aggregate.
Afterwards he told Sky Sports: "It was emotional in both games, especially tonight, it was unbelievable.
"I don't have words to explain what I feel. I just have one word to say it is unbelievable.
Ronaldo got past Rafael da Silva and slid to tap in a cross from Gonzalo Higuain. Ronaldo, who did not celebrate on the field of his former club, reached 40 goals for the third consecutive season.
"What the supporters did made me feel quite shy because in my opinion in both games I didn't play like I play all the time," he said. "But anyway I helped my team to score one goal home and away. I feel happy inside because Madrid got through but on the other hand I feel a little bit sad because Manchester United deserved (to win).
"But it's part of the football. It's feelings that stay in there and this doesn't change things."
The match swung on a red card shown to Nani while United was 1-0 up -- a decision which incensed the home side.
"To be honest I didn't see the replay of what Nani did but these situations happen in football," Ronaldo added. "I'm not going to say any more because I didn't see the replay."
Information from Press Association and The Associated Press was used in this report.