Australian Open runner-up Jennifer Brady has withdrawn from the U.S. Open because of an injury.
Brady, a semifinalist last year in Flushing Meadows, has not played competitively since being forced to retire from her second-round match against Jelena Ostapenko in Cincinnati. The U.S. Tennis Association did not specify her injury.
Ostapenko, the 2017 French Open champion, also pulled out Monday for medical reasons.
On the men's side, Jo-Wilfried Tsonga also withdrew. The 2008 Australian Open finalist has a right leg injury.
Play has started at the U.S. Open, with fans back in the stands for the final Grand Slam tournament of the season.
The event was held without spectators last year due to the pandemic but stands are allowed to be filled to 100% capacity this year. Those 12 and older must show proof of at least one dose of a COVID-19 vaccine to enter the Billie Jean King National Tennis Center.