Wimbledon 2013: Andy Murray admits maturity was crucial to fightback In front of the watching Sir Alex Ferguson, Murray produced a Manchester United-like turnaround to win 4-6, 3-6, 6-1, 6-4, 7-5 on Centre Court. The 26-year-old, who planned to meet up with the former United manager, claimed such a match might easily have gone the other way in his younger days. "When you play more matches and gain more experience, you understand how to turn matches around and how to change the momentum of games," said Murray, who has come from two sets down to win seven times in his career. That can be tactical; sometimes it can be your opponent. But often you need to be the one making the change. Maybe, when I was younger, I could have lost that match. But I think I've learnt how to come back from tough situations more as I get older. Murray, who will play Poland's Jerzy Janowicz in his fifth successive Wimbledon semi-final, admitted he was fearing defeat after falling two sets behind. "You're concerned how the match is going and that you may lose," the world No 2 said. When you've been in that position a lot of times you know how to think through it and not get too far ahead of yourself. I definitely didn't rush when I went two sets to love down. I slowed myself down, if anything, and that was a good sign. Murray's frustration did boil over, however, and he was heard to scream, "What the ---- are you doing? What the ---- are you doing?" on live television, an outburst for which the BBC immediately apologised. Murray said: "A lot of players get frustrated on the court, but you need to try and find a way to respond and not get too down on yourself." An increasingly partisan Centre Court crowd and Henman Hill helped in that respect. "I love it when it's like that," Murray said. It was extremely noisy. They were right into it pretty much every single point. When I went behind, the crowd got right behind me and made a huge, huge difference. If they can be like that from the first point to the last in all of the matches, it makes a huge difference. One high-profile fan, Prime Minister David Cameron, wished Murray luck on Twitter in defiance of the so-called 'Curse of Cameron. Cameron is thought to have jinxed several athletes in the past, including Murray when he turned up at last year's Wimbledon final. A bemused Murray said: "What he tweets has zero bearing on the outcome of my match."