Serena and Venus Williams withdraw from 2021 U.S. Open
Serena and Venus Williams have both withdrawn from the 2021 U.S. Open, becoming the latest high-profile tennis stars to drop out of the tournament. The sisters made their announcements on social media Wednesday, marking the first time since 2003 that neither will play in the last Grand Slam tournament of the year. Roger Federer, Rafael Nadal and