Venus Williams, at 45, marked her return to Grand Slam competition at the US Open against Karolina Muchova, making her the oldest singles player since 1981. Despite early momentum shifts and chants of support,

Venus Williams loses her first-round match at the US Open to Karolina Muchova in three sets. ESPN BET Sportsbook is owned and operated by PENN Entertainment, Inc. and its subsidiaries ('PENN'). ESPN BET is available in states where PENN is licensed to offer sports wagering.

Venus Williams, 45, became the oldest singles player to compete in a hard-court tournament since 1981 during her loss to Karolina Muchova at the U.S. Open.