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
2014 US Open – Women's Singles 2014 US Open – Women's Singles Serena Williams was the two-time defending champion and successfully defended her title, defeating Caroline Wozniacki in the final, 6–3, 6–3. Williams did not lose a set in the entire tournament and did not lose more than three games in any set. This was Williams' 18th Grand Slam singles title, tying the number won by Martina Navratilova and Chris Evert. With the victory, Serena tied the Open Era record of six US Open titles held by Evert. This was Williams' third US Open championship that she competed in without losing a set, also tying Evert.