After supporting their friend at Wimbledon in July, the musicians watched Williams compete in the U.S. Open in New York City Thursday. Enjoying a kid-free night out (their 4-year-old daughter Blue Ivy Carter was presumably at home), the couple sat one row behind Williams' family. Throughout the evening, the "Crazy in Love" collaborators oohed and aahed in the stands.
Williams faced Vania King, beating her fellow American tennis pro 6 to 3.
Beyoncé and Jay Z's presence didn't go unnoticed.
"I looked up and was like, 'Oh s--t! Beyoncé is watching,'" King told ESPN.
Williams invited the power couple to watch her compete. "Usually when people are there, I try to play better, especially if they're famous and they're doing so great at their job," the athlete said after the match. "It's like I want to show them that I'm good at my job, too—minus today."