2009 US Open – Women's Singles 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 player and wild card to win the tournament, and the first mother to win a major since Evonne Goolagong in 1980. Following her win, she made 19th in the rankings. This was the final Grand Slam appearance for former two-time Grand Slam champion, Amélie Mauresmo, who lost to Aleksandra Wozniak in the
2009 US Open (tennis) to the quarterfinals with a retirement of Russian Nikolay Davydenko to face the Swiss Roger Federer, who beat Spaniard Tommy Robredo in straight sets. This would mark the third time the duo of Federer and Söderling has met in a Grand Slam in 2009, including the 2009 French Open final and the 2009 Wimbledon Championships fourth round, which were both won by Federer. Spaniard Fernando Verdasco beat American John Isner to advance into the quarterfinals, which means for the first time in US Open history no American male advanced into the quarterfinals of the tournament. Verdasco would face Serbian Novak