Roberta Vinci of Italy (AP Photo/Kathy Willens)
Leonardo Mayer of Argentina (REUTERS/Ray Stubblebine)
Ekaterina Makarova of Russia (AP Photo/Charles Krupa)
Rafael Nadal of Spain (AP Photo/Charles Krupa)
Caroline Wozniacki of Denmark (REUTERS/Adam Hunger)
Andy Murray of Great Britain (AP Photo/David Goldman)
Daniela Hantuchova of Slovakia (AP Photo/Mike Groll)
Richard Gasquet of France (AP Photo/Julio Cortez)
Marcel Granollers of Spain (REUTERS/Eduardo Munoz)
Victoria Azarenka of Belarus (REUTERS/Eduardo Munoz)