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
US Open (tennis) women's singles final, which was pushed into primetime by rain delays. Since 1978, the US Open has been played on a hard court surface called Pro DecoTurf. It is a multi-layer cushioned surface and classified by the International Tennis Federation as medium-fast. Each August before the start of the tournament, the courts are resurfaced. Since 2005, all US Open and US Open Series tennis courts have been painted a shade of blue (trademarked as "U.S. Open Blue") inside the lines to make it easier for players, spectators, and television viewers to see the ball. The area outside the lines is