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
2018 US Open – Women's Singles final 2018 US Open – Women's Singles final The 2018 US Open Women's Singles final was the championship tennis match of the Women's Singles tournament at the 2018 US Open. It was contested between Serena Williams and Naomi Osaka, seeded 17th and 20th respectively. Osaka defeated Williams in straight sets, 6-2, 6-4 in one hour and 19 minutes. The match was historically significant for both players. It was Williams' first US Open after a 12-month hiatus to give birth to her first child in September 2017, and second attempt since her pregnancy (after that year's Wimbledon) to equal Margaret Court's all-time