Murray let his frustration show as he lost at Queen's
Wimbledon Championships Venue: All England Club, London Date: 21 June - 4 July Coverage: Live on BBC One and Two, HD, Red Button, BBC Sport website (UK only), Radio 5 live, 5 live sports extra; live text commentary online and on mobile phones.
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Andy Murray must tackle his inner demons or squander his potential to be a Wimbledon champion, according to former British number one John Lloyd.
"The draw has been extremely kind to Andy and I think he will definitely get to the semi-finals," said Lloyd.
"I think he has the game to win it. I have said this for many years.
"The problem has been, in the last three months, the mental side of his game has not been good. He won't win it unless he changes his attitude."
Murray starts his campaign on Tuesday, when he faces world number 80 Jan Hajek of Czech Republic.
The 23-year-old fourth seed is on the other side of the draw from top seed Roger Federer and cannot play world number one Rafael Nadal until the semi-finals.
But, although the Scot this week said he felt in good shape, he has suffered indifferent form since reaching the Australian Open in January.
If he is going to beat Nadal and Federer, he has got to be as tough as nails. Anything less than that and he won't win it
"I think that's shown up at the French and Queen's, where he has been going through these dips in the middle of matches where, quite frankly, I don't know what he is doing," Lloyd told BBC Scotland.
"He goes out there and looks like he does not want to be on court and throws away points and he's making lots of gestures to his bench or to his support group."
Lloyd, who worked closely with Murray as Davis Cup captain, was at a loss to explain the present British number one's recent court demeanour.
"It is ever since the Australian Open, where he had a really unbelievable tournament and got to the final and was playing magnificently and then it seemed like he almost got a bit stale about the game and wasn't enjoying it as much," said Lloyd.
"He said that at times he was struggling to train as hard as he had been. Maybe he had overdone it, I don't know."
Lloyd believes that, unlike someone like John McEnroe, Murray's on-court moans have been hampering his game.
The perfect example of that was the French Open, where Lloyd thought the Scot had a "wonderful draw" and ought to have beaten Thomas Berdych.
"He really could have got through to the semi-finals and he just went into one of these periods where he was just moaning about everything and it was becoming detrimental to his game," said the Englishman.
"You can't do that at a Grand Slam. You can get through the early rounds and he certainly can because, with this draw, he is a class player and, to be quite frank, the only person that I can see who can hurt him getting to the semi-finals is Sam Querrey, who won Queens last week.
"Other than that, he has a dream draw and there's no reason he shouldn't get to the semi-finals. You get to the semi-final of a Grand Slam, you are talking about a two-match shootout and and anything can happen.
"But, mentally, he's got to be tough. If he is going to beat Nadal and Federer, which in all likelihood he will have to do to win Wimbledon, he has got to be as tough as nails. Anything less than that and he won't win it.
"The top players on the tour, they are predators. If they sense blood, they are going to go for it.
"And, when they see someone on the other side of the court who is being negative and is throwing out this negative body language, to them it is like giving them a Christmas present and they are going to take it."
However, Lloyd still believes that Murray, who lost to Andy Roddick in last year's Wimbledon semi-final, will one day win a Grand Slam title but needs to alter his attitude.
"He can change that and maybe walk into the gates of Wimbledon on the first day," he suggested.
"Maybe that will get that desire back and that hunger to go all the way, because he has got the game to win Wimbledon."
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