...tennis player Ivo Karlovic plays a backhand return during his men's singles match against compatriot Ivan Ljubicic on the fifth day of play at the Australian Open tennis tournament in Melbourne on January...

Novak Djokovic of Serbia returns the ball to Ivan Ljubicic of Croatia during the first round of the U.S. Open tennis tournament in New York...

NEW YORK - SEPTEMBER 01: Novak Djokovic of Serbia returns a shot against Ivan Ljubicic of Croatia during day two of the 2009 U.S. Open at the USTA Billie Jean...

Ivo Karlovic of Croatia, right, greets compatriot Ivan Ljubicic after winning their Men's singles third round match at the Australian Open tennis championship in...

Spanish Rafael Nadal hits a return to his croatian opponent Ivan Ljubicic during their Monte Carlo ATP Masters Series tournament tennis match on April 17, 2009 in Monaco...

Spainish Rafael Nadal hits a return to his Croatian opponent Ivan Ljubicic during their Monte Carlo ATP Masters Series tournament tennis match on April 17, 2009 in Monaco...

Andy Murray of Great Britain hits a return against Ivan Ljubicic of Croatia during the quarterfinals at the Indian Wells ATP tennis tournament in Indian Wells, California...

Ivan Ljubicic of Croatia plays a return stroke during his men's singles match against Jo-Wilfried Tsonga...

Marcos Baghdatis from Cyprus returns a backhand during his game against Ivan Ljubicic from Croatia during the Kooyong Classic tennis tournament in Melbourne, Thursday, Jan. 15, 2009. Baghdatis won...

Jo-Wilfried Tsonga of France plays a return stroke during his men's singles match against Ivan Ljubicic of Croatia at the Australian Open tennis tournament in Melbourne on January 22, 2009. The match...

JOURNEY TO BEIJING

Croatia's water polo world championship inspired Ivan Ljubicic and Mario Ancic to don headgear and take the plunge at a high school pool in...

The Championships - Wimbledon 2007 Day Two LONDON - JUNE 26: Ivan Ljubicic of Croatia plays a backhand during the Men's Singles first round match against Vincent Spadea...

French player Gael Monfils hits a return to Croatian player Ivan Ljubicic during their French tennis Open fourth round match at Roland Garros, on June 02, 2008 in...

...Nikolay Davydenko of Russia feels the pressure during the Men's Singles third round match against Ivan Ljubicic of Croatia on day seven of the French Open at Roland Garros on May 31, 2008...

...gestures after his first round match at the Monte Carlo Tennis Open tournament against Croatian player Ivan Ljubicic, in Monaco, Monday, April 21, 2008. Ljubicic won 6-1, 6-2