• U.S. Open kickoff event. Xchange at the Terminal Stores, 640 W. 28th St., nr. Eleventh Ave.., 7:30 p.m. Expected: Maria Sharapova, Steve Nash, Eddy Curry, John Starks, and more. But where are the rest of today’s hottest tennis stars? Why, they’ll be living it up at the…

• Dacor “Taste of Tennis” event. 541 Lexington Ave., nr. 49th St., 7 p.m. Expected guests include Andy Roddick, Rafael Nadal, Lleyton Hewitt, and the party-hopping Maria Sharapova. But wait? Where’s Roger Federer, the biggest star of them all? Why, he’ll be living it up at the…
• Men’s Vogue party for Roger Federer. Gramercy Park Hotel, 2 Lexington Ave., nr. 21st St., 7:30 p.m. Other guests expected to include Rachel Weisz, Lauren Bush, Ivanka Trump, and others.

Or check out our Agenda listings for tonight, selected by New York's culture editors.