Andy Murray will only win a Grand Slam title if he beats the demons of self-doubt, says Wimbledon legend John Newcombe. Former world No1 Newcombe, who won three Wimbledon titles, believes Murray has the game to trouble the best but is being held back by a lack of self-belief.Newcombe said: “Murray has got to get his game to another level if he’s going to win Grand Slam tournaments. His biggest problem is that he withdraws instead of attacking when the pressure is on during big points in big matches. We saw that in the Wimbledon semi-final when he lost in straight sets to Rafael Nadal because he was too quick to go on the defensive.“The other issue for Andy is that his first serve percentage is not high enough. He’s got to reduce his body movement and his swing in the manner of the world’s best golfers.”Newcombe feels British No1 Murray made the wrong decision to appoint Miles Maclagan as his coach for the past three years before their post-Wimbledon split.“Andy can win a Grand Slam tournament if he can find his self-belief and a new coach,” he said. "He needs a coach to fine-tune his serve and his mental approach because there isn’t anything hugely wrong with other aspects of his game. Andy has become too timid against Federer and Nadal"The final Grand Slam of the season, the US Open, starts in three weeks’ time at Flushing Meadows, and Newcombe is confident of a good showing from Murray
"We had a great run together but we've had a difference of opinion regarding some aspects of my game," said Murray. "I've not thought about my next coach and will take time to find one who can help develop the next stages of my tennis. We are not in a hurry."