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
2018 US Open (tennis) 2018 US Open (tennis) The 2018 US Open was the 138th edition of tennis' US Open and the fourth and final Grand Slam event of the year. It was held on outdoor hard courts at the USTA Billie Jean King National Tennis Center in New York City. Rafael Nadal and Sloane Stephens were the defending champions in the men's and women's singles events, however both failed to defend their titles. Nadal retired during his semifinal match against Juan Martín del Potro. Stephens was defeated in the quarterfinals by Anastasija Sevastova, whom Stephens had beaten at the same stage the previous