It's more a tennis problem than a mental problem. The transition is difficult. It depends how much time you have. Playing on grass can sometimes be a bit of a lottery.

2 for the fourth time in five years. He was upset in the third round of the Rogers Cup in Toronto and the quarterfinals of the Western & Southern Financial Group Masters in Cincinnati Ohio. In the quarterfinals of the US Open he defeated Fernando Gonzálezin a rain-delayed encounter.

He is the second male player to complete the Career Golden Slam (winner of the Career Grand Slam and the Olympic gold medal) after Andre Agassi. 2 ranking for an ATP record 241 weeks (as of 9 July 2012). He held it until 3 July 2011 when Novak Djokovic replaced him as world No.