Maria Kirilenko

Maria Kirilenko of Russia tosses her racket after missing a point against Flavia Pennetta of Italy in the second round at the Sony Ericsson Open tennis tournament in Key Biscayne, Fla. Friday, March 27, 2009

Roger Federer, of Switzerland, prepares to serve to Kevin Kim in the second round at the Sony Ericsson Open tennis tournament in Key Biscayne, Fla. Friday, March 27, 2009. Federer won 6-3, 6-2.

Rafael Nadal

Rafael Nadal, of Spain, pauses during a quarterfinal against Juan Martin del Potro, of Argentina, at the BNP Paribas Open tennis tournament in Indian Wells, Calif., Friday, March 20, 2009

Ana Ivanovic

Ana Ivanovic, of Serbia, celebrates after defeating Mariya Koryttseva, of Ukraine, 6-0, 6-3, at the Sony Ericsson Open tennis tournament in Key Biscayne, Fla. Friday, March 27, 2009