Serena Williams overcame a scare against Dutch qualifier Arantxa Rus to reach the Western and Southern Open third round in New York.
American Williams, 38, stopped Rus serving out the match at 6-5 before winning 7-6 (8-6) 3-6 7-6 (7-0) in almost three hours.
Two-time champion Williams will play Greece’s 13th seed Maria Sakkari in the third round.
Fourth seed Naomi Osaka of Japan beat Karolina Muchova 6-7 (5-7) 6-4 6-2.
The world number 10 was playing her first match since the WTA resumed after it was suspended because of the coronavirus pandemic.