2016 US Open – Women's Singles No. 1 ranking at the start of the tournament. Former world No. 1 and 2008 French Open champion Ana Ivanovic played the final match of her professional career in the first round, when she lost to Denisa Allertová. She would announce her retirement prior to the 2017 season because of ongoing injuries. 2016 US Open – Women's Singles Flavia Pennetta was the defending champion, but retired from professional tennis at the end of the 2015 season. Angelique Kerber won the title, defeating Karolína Plíšková in the final, 6–3, 4–6, 6–4. It was Kerber's second Grand Slam singles title. She became
2008 US Open – Women's Singles the start of the tournament. Notably this was the final Grand Slam in which 1998 champion and former World No. 1 Lindsay Davenport competed in the singles championship. She lost to Marion Bartoli in the third round. 2008 US Open – Women's Singles Justine Henin was the defending champion, but retired from the sport on May 14, 2008. Serena Williams defeated Jelena Janković 6–4, 7–5 in the final, winning her third US Open title. By winning her title, Williams regained the WTA no. 1 singles ranking for the first time since 2003. This was also the second US Open and