NEW YORK - SEPTEMBER 01: Andy Murray of Great Britain returns a shot against Ernests Gulbis of Latvia during day two of the 2009 U.S. Open at the USTA Billie Jean...

...Murray of Great Britain plays a forehand during the men's singles second round match against Ernests Gulbis of Latvia on Day Four of the Wimbledon Lawn Tennis Championships at the All England Lawn...

Latvia's Ernests Gulbis sits in a chair as he plays Russia's Igor Andreev during their men's singles...

MELBOURNE, AUSTRALIA - JANUARY 22: Ernests Gulbis of Latvia plays a forehand in his second round match against Igor Andreev of Russia during...

...ball boy carries the broken racket of Andy Roddick of the US during his match against Ernests Gulbis of Latvia at the US Open tennis tournament August 29, 2008 in Flushing Meadows, NY. AFP...

NEW YORK - AUGUST 29: Andy Roddick of the United States returns a shot against Ernests Gulbis of Latvia during Day 5 of the 2008 U.S. Open at the USTA Billie Jean...

NEW YORK - AUGUST 29: Andy Roddick of the United States looks on against Ernests Gulbis of Latvia during Day 5 of the 2008 U.S. Open at the USTA Billie Jean...

Andy Roddick of the US returns to Ernests Gulbis of Latvia at the US Open tennis tournament August 29, 2008 in Flushing Meadows, NY. AFP...

CAPTION: Jun 26, 2008; London, ENGLAND; Rafael Nadal (ESP) returns a shot against Ernests Gulbis (LAT) during the second round of the Wimbledon Lawn Tennis Championships at the All England Lawn...

Spain's Rafael Nadal returns to Latvia's Ernests Gulbis during their Men's Singles, second round on the Number One Court at Wimbledon, Thursday, June...

...Rafael Nadal of Spain plays a backhand during the round two men's singles match against Ernests Gulbis of Latvia on day four of the Wimbledon Lawn Tennis Championships at the All England Lawn...

Britain's Andy Murray celebrates winning a point during his tennis match against Latvia's Ernests Gulbis on the fourth day of the Artois Championships at the Queen's Club in London, Thursday...

Latvian player Ernests Gulbis hits a return to French player Michael Llodra during their French tennis Open fourth round match...

US player James Blake returns a ball to Latvian player Ernests Gulbis during the second round of the French Tennis Open, at Roland Garros, in Paris, on May...

Latvia's Ernests Gulbis returns the ball to United States player James Blake during their second round match at the...