LONDON - Andy Murray insists he didn't celebrate Rafael Nadal's stunning exit from Wimbledon even though the Spaniard's loss is a major boost to the world number two's title challenge. Murray has lost 13 of his 18 meetings with Nadal, including three painful defeats at the All England Club in the 2010 and 2011 semi-finals and the 2008 quarter-finals. Given that dismal sequence, the 26-year-old could have been forgiven for cursing when he learnt last week that French Open champion Nadal was a potential last four opponent once again at Wimbledon. "It's pretty irrelevant right now," he said. "I'm sure for you guys it's very relevant, but for the players, especially me, you have to win at least four more matches before that would even become something I would think about. –AFP