Watch out Serena Williams! The tennis champ isn’t the only star throwing up her best shots at the 2019 U.S. Open this year! Celebs from all over Hollywood will be flocking to the USTA Billie Jean King National Tennis Center in New York for the annual tennis tournaments from August 26 until September 8. Scroll through to see which stars served looks on and off the court! Catch the U.S. Open on Tennis Channel now through September 8.