The stage is set for a monumental matchup between WTA titans, Serena Williams and Maria Sharapova, ranked No. 1 and 2 in the world, respectively. It will be a rematch from the gold medal match at the 2012 London Olympic games, when the two meet on Saturday. Yesterday, Maria Sharapova made short work of Jelena Jankovic in a match that lasted barely over an hour, 6-2, 6-1. Later in the evening, Serena Williams breezed through her semifinal match against Agnieszka Radwanska, 6-0, 6-3.