Roger Federer, of Switzerland, reaches for a return against Ivo Karlovic, of Croatia, during a match at the Sony Open tennis tournament, Friday, March 21, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

Sony Open Tennis

Roger Federer, of Switzerland, reaches for a return against Ivo Karlovic, of Croatia, during a match at the Sony Open tennis tournament, Friday, March 21, 2014, in Key Biscayne, Fla. (AP Photo/Lynne Sladky)

Top Ranked Players
More Rankings