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) courts just outside the East Gate) consisting of four "show courts" (Arthur Ashe Stadium, Louis Armstrong Stadium, the Grandstand, and Court 17), 13 field courts, and 5 practice courts. The main court is the 23,771-seat Arthur Ashe Stadium, which opened in 1997. A US$180 million retractable roof was added in 2016. The stadium is named after Arthur Ashe, the African-American who won the men's singles title at the inaugural US Open in 1968, the Australian Open in 1970, and Wimbledon in 1975 and who was inducted into the International Tennis Hall of Fame in 1985. The next largest court is