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 (tennis) on her second championship point. This was the ninth Grand Slam tournament that Williams had won, and she did not drop a set on her way to doing so. At the time, Williams joined an elite group of six women who had won nine or more Grand Slam titles in the open era, equalling Monica Seles's tally with this triumph. Williams, who had dominated the sport from 2002 to 2003, but been ranked outside the top 125 in 2006, put her renaissance, not only in this tournament but for the whole of 2008, down to a better approach towards fitness.