Roger Federer (L) and Stanislas Wawrinka of Switzerland pose for pictures with their gold medals after they won the Olympic gold in...

Aug 16, 2008; Beijing, CHINA; Roger Federer (SUI), left, and Stanislas Wawrinka (SUI), right, during a match played against Sweden in the final round of the 2008 Beijing...

Roger Federer and Stanislas Wawrinka, left, of Switzerland celebrate Saturday after beating Sweden's Thomas Johansson and Simon Aspelin in Beijing...

Novak Djokovic of Serbia holds the trophy after winning the men's final match against Stanislas Wawrinka, at the Rome Master tennis tournament, in Rome, Sunday, May 11, 2008. Djokovic won 4-6...

ROME - MAY 11: Novak Djokovic of Serbia in action against Stanislas Wawrinka of Switzerland during the mens final at the ATP Masters Series at the Foro Italico, on...

...treatment from the trainer before having to retire at the end of the third game against Stanislas Wawrinka of Switzerland during their semi-final match at the ATP Masters Series at the Foro Italico...

Geneva, SWITZERLAND: Serbia's Novak Djokovic returns a shoot to Switzerland's Stanislas Wawrinka during their tennis game of the Davis Cup world group playoff tie, 22 September 2006 in...

Gael Monfils of France returns a shot to Stanislas Wawrinka of Switzerland during the Pilot Pen Tennis August 22, 2007 at the Connecticut Tennis Center in...

Juan Ignacio Chela survived a fifth set to reach the fourth round and will play Stanislas Wawrinka for a spot in the quarterfinals

...after a four-set win to advance to the third round. Nadal next takes on Swiss, Stanislas Wawrinka

A semifinalist in 2005, David Nalbandian had little trouble with Stanislas Wawrinka in the first round

Roger Federer of Switzerland servesl to Stanislas Wawrinka of Switzerland during the first round at the US$1 million Dubai Duty Free Men's...