Real Madrid star Cristiano Ronaldo felt his side contributed to their own problems against Galatasaray on Tuesday night and hopes they will learn from the experience for future matches.
Madrid looked to be cruising through to the semi-finals of the Champions League after Ronaldo's early goal put them 1-0 up at the Ali Sami Yen stadium and 4-0 up on aggregate, but the Turkish side fought back to lead 3-1 on the night before Ronaldo scored his second goal soon after Alvaro Arbeloa was sent off.
Ronaldo said: "It was our own fault things became complicated. In football you cannot give anything away and you need to play for 90 minutes. What happened here cannot be repeated in the future."
The Portugal international added: "We're happy to have gone through. We've fulfilled the objective and now we wait and see who we're drawn against."
His team-mate Pepe added on Madrid's official website: "The team fought hard and made a big effort.
"We are very happy to get through the tie. In the first half we started very well. It's true that we dropped the intensity a little in the second half and we weren't as good, but we improved at the end.
"The most important thing is that we have got through to the next round."