Serena is 19-12 all-time against Venus, including 11 wins in majors and a 7-2 mark in Grand Slam finals. There was a stretch from 2002-03 where the Williams sisters played each other in the championship round of five straight majors, including twice at Wimbledon.

Venus Williams celebrates victory in the women's doubles at the Washington Open after a 16-month absence, while Britain's Dan Evans and Cameron Norris advance to the second round.

Venus Williams won her first match after being on hiatus for 16 months, with new doubles partner Hailey Baptiste. On Tuesday, the 45-year-old tennis star will face Peyton Stearns in singles at the D.C.