Rafael Nadal (left) celebrates a point win against Roger Federer during their semifinal Jan. 26, 2012, at the Australian Open in Melbourne, Australia. (Associated Press)
Rafael Nadal celebrates during his quarterfinal against Tomas Berdych at the Australian Open tennis championship, in Melbourne, Australia, Tuesday, Jan. 24, 2012. (AP Photo/Vivek Prakash,Pool)
Spain's Rafael Nadal makes a backhand return to Germany's Tommy Haas during their second round match at the Australian Open tennis championship, in Melbourne, Australia, Wednesday, Jan. 18, 2012. (AP Photo/Andrew Brownbill)
Spain's Rafael Nadal makes a backhand return to Alex Kuznetsov of the U.S. during their first round match at the Australian Open tennis championship, in Melbourne, Australia, Monday, Jan. 16, 2012. (AP Photo/Rick Rycroft)
Rafael Nadal makes a forehand return to Alex Kuznetsov during their first-round match Jan. 16, 2012, at the Australian Open in Melbourne, Australia. (Associated Press)
Spain's Rafael Nadal makes a forehand return during a practice session for the Australian Open in Melbourne, Australia, Thursday, Jan. 12, 2012. (AP Photo/Mark Baker)
Spain's Rafael Nadal celebrates defeating Argentina's Juan Monaco after the first match of the Davis Cup Final, in Sevilla, Spain, Friday, Dec. 2, 2011. (AP Photo/Daniel Ochoa de Olza)
Rafael Nadal of Spain reacts after winning a semifinal match against Andy Murray of Britain at the U.S. Open in New York on Saturday, Sept. 10, 2011. (AP Photo/Charlie Riedel)
Rafael Nadal of Spain hits a ball into the stands after winning a quarterfinal match against Andy Roddick at the U.S. Open tennis tournament in New York, Friday, Sept. 9, 2011. (AP Photo/Matt Slocum)
ASSOCIATED PRESS
Rafael Nadal said his leg cramp was treated as a bigger deal because it occurred in the interview room rather than in the locker room.
ASSOCIATED PRESS
Rafael Nadal, the No. 2 seed, dispatched David Nalbandian in straight sets before experiencing a severe leg cramp during Sunday's action at the U.S. Open. He reacted to the pain (below) during his post-match news conference.
Rafael Nadal, from Spain, complains to the chair umpire during a change over in a quarterfinal match against Mardy Fish at the Western & Southern Open tennis tournament, Friday, Aug. 19, 2011 in Mason, Ohio. Fish won 6-3, 6-4. (AP Photo/Al Behrman)
Serbia's Novak Djokovic dives for a return shot to Spain's Rafael Nadal during the men's singles final at the All England Lawn Tennis Championships at Wimbledon, England, on Sunday, July 3, 2011. (AP Photo/Kirsty Wigglesworth)
Spain's Rafael Nadal celebrates defeating Britain's Andy Murray in the men's semifinal match at the All England Lawn Tennis Championships at Wimbledon, Friday, July 1, 2011. (AP Photo/Kirsty Wigglesworth)
Spain's Rafael Nadal returns a shot during his men's semifinal match against Britain's Andy Murray at the All England Lawn Tennis Championships at Wimbledon, Friday, July 1, 2011. (AP Photo/Alastair Grant)
ASSOCIATED PRESS
Rafael Nadal, who won Wimbledon in 2008 and 2010, is 31-2 in matches at the tournament since 2006. This year, he is dealing with a painful left foot injury (below).
Spain's Rafael Nadal smiles during a press conference at the All England Lawn Tennis Championships at Wimbledon, Sunday, June 19, 2011. (AP Photo/AELTC,Tom Lovelock,Pool)
Rafael Nadal lifts his trophy after defeating Switzerland's Roger Federer (right) in the men's final match of the French Open tennis tournament at the Roland Garros Stadium in Paris on Sunday, June 5, 2011. (AP Photo/Lionel Cironneau)
Spain's Rafael Nadal reacts after defeating Switzerland's Roger Federer during the men's final match for the French Open tennis tournament at the Roland Garros stadium, Sunday, June 5, 2011, in Paris. (AP Photo/Lionel Cironneau)