The first semi final on Arthur Ashe Stadium saw world number 2 and last year’s runner up Victoria Azarenka take on the 83rd ranked Flavia Pennetta after the conclusion of the mixed doubles final, won by Max Mirni and Andrea Hlavackova. Azarenka won the toss and put the Italian in to serve. The first two games saw breaks on both sides of the net, followed by holds. Azarenka broke again in the 5th game but then served two double faults in the 6th game to hand back the advantage. The Belarusian and the Italian then broke each other again before Azarenka got the break to take her to 5-4. Serving for the set, there was a ten minute game with ads one either side until Azarenka managed to take the set 6-4 on her 6th set point. The second set started as the first, but this time with breaks of serve in the first three games before Azarenka held for 3-1 and then broke again for 4-1. Pennetta then got one break back, but Azarenka took the next two games for the set at 6-2 and her place in the final once again.
The second semi was between world number one Serena Williams and 5th seed Na Li. Going into this match, Serena led the head to head 8-1, with Li’s only win coming way back in 2008. Serena took the first set to love, even though the second to fifth games were reasonably competitive. The second set was much more competitive with some fantastic tennis on show from both players, although both of them did not play their best until the last two games. Serena broke in the 6th game and then held, but Li was not yet ready to go home. The very long 7th game saw seven deuces and Li eventually won it after saving 6 match points to trail 3-5. However, that was her last shout as Serena and after yet another long game, the American served out for the set at 6-3, setting up a rematch of last year’s final.