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 (tennis) year. Novak Djokovic won the men's singles title, defeating del Potro in the final, 6–3, 7–6, 6–3. It was his third US Open title and 14th Grand Slam, tieing Pete Sampras' record to become equal third among all-time Grand Slam champions. In women's singles, Naomi Osaka defeated Serena Williams in the final, 6–2, 6–4, becoming Japan's first ever able-bodied Grand Slam singles champion. The 2018 US Open was the 138th edition of the tournament and took place at the USTA Billie Jean King National Tennis Center in Flushing Meadows–Corona Park of Queens in New York City, New York, United States.