Justin Timberlake & Jimmy Fallon Do Beyoncé's 'Single Ladies' Dance at the U.S. Open: Watch

EPA/JUSTIN LANE/LANDOV
Jimmy Fallon and Justin Timberlake do the "Single Ladies" dance from their seats during a quarterfinals match at the 2015 US Open Tennis Championship at the USTA National Tennis Center in Flushing Meadows, New York on Sept. 9, 2015. 

Justin Timberlake and Jimmy Fallon weren't just enjoying U.S. Open's gameplay on Wednesday night but the music too. 

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The dynamic duo were caught on camera dancing along to Beyoncé's "Single Ladies" during the change over. And it's no surprise they knew the music video's choreography pretty darn well. 

Watch them here: