Serena Williams beat Kristie Ahn to win her 102nd US Open singles match, an all-time record. Serena Williams was given a good workout to start her 2020 US Open. The third seed beat world number 96 Kristie Ahn 7-5 6-3 having been a break of serve down in both sets. It was Serena's 102nd singles win at the US Open, beating Chris Evert's all-time record.