How to watch: 6 p.m. to 9 p.m. Eastern on the Tennis Channel, 9 p.m. to 10 p.m. on ESPNEWS and 10 p.m. to 7 a.m. on ESPN2 in the United States; streaming on the ESPN+ and ESPN3 apps.
Jessica Pegula of the United States upset the 12th seed, Victoria Azarenka, in the opening round for her first match victory at a major tournament, and she will now face the Australian veteran Samantha Stosur. Although Stosur has focused on playing doubles over the past few years, she is still a force in singles, especially with a home-court advantage.