Cristiano Ronaldo insists he will stay at Real Madrid until his contract expires in 2015 Every Madridista wants that 10th European Cup - we're more than aware of that. Last season we fell just short, which was very frustrating, but fortunately we've got the opportunity to set the record straight this year, though the fact we face Manchester United next makes it more difficult. United go into next month's last 16 tie having failed to defeat Real over two legs since a European Cup semi-final victory in 1967-68. Real have won the two Champions League encounters since, but while Jose Mourinho's team have been installed as favourites to beat United and progress to the quarter-finals, Ronaldo insists that the tie is too close to call. "It's not going to be easy and I reckon the odds are about 50-50, but I'm still very confident," Ronaldo said to Fifa.com. No team is unbeatable, but when we're at our best we're a really good side. Manchester United have started the English championship race very well and are a long way ahead of the rest, but still, if we play the way we're capable of, we can beat them. To do that we need to pull together and play as a team, like we've done in so many matches before.