2009 US Open – Women's Singles second round. This was also the final Grand Slam singles appearance of Ai Sugiyama, who was on a record-breaking 62nd consecutive Grand Slam singles appearance, lost in the first round to Samantha Stosur. Sugiyama's record-breaking run of 62 consecutive Grand Slam singles appearances remains unbeaten as of 2019. Dinara Safina "(Third round)" 2009 US Open – Women's Singles Serena Williams was the defending champion, but was defeated in the semifinals by the eventual champion Kim Clijsters. Clijsters defeated first time Grand Slam finalist Caroline Wozniacki in the final to win her second US Open title. Clijsters became the first unseeded
2009 US Open (tennis) in 47 minutes. Dulko had beaten Bondarenko's sister, Alona Bondarenko, in the second round. with Dulko making 20 unforced errors compared to Bondarenko's 6, while Bondarenko made 17 winners to Dulko's 7. Melanie Oudin advanced to her first Grand Slam quarterfinal with a 1-6, 7-6, 6-3 win over No. 13 seed Nadia Petrova. Belgian Yanina Wickmayer won in a three-set match against Czech Petra Kvitová to advance into the quarterfinals, making two Belgians who have advanced to the quarterfinalss for the first time since the 2003 US Open tournament. Wickmayer took advantage of the Czech's unforced errors and won the