FILE - In this Friday, Aug. 31, 2018, file photo, Serena Williams, left, embraces her sister Venus Williams after their third-round match at the U.S. Open tennis tournament in New York. Serena Williams won 6-1, 6-2. The siblings meet each other for the 31st time when they take the court at a WTA tournament in Kentucky on Thursday, Aug. 13, 2020. (AP Photo/Adam Hunger, File)

FILE - In this Sunday, Feb. 11, 2018, file photo, USA's Venus Williams, left, and Serena Williams, right, talk between points in their doubles match against Netherlands' Leslie Herkhove and Demi Schuurs in the first round of Fed Cup tennis competition in Asheville, N.C. The siblings meet each other for the 31st time when they take the court at a WTA tournament in Kentucky on Thursday, Aug. 13, 2020. (AP Photo/Chuck Burton, File)