Seeing them get up and do the choreography from Beyoncé‘s “Single Ladies”!
The classic moment (which was every bit as good as when JT, Paul Rudd and Andy Samberg did the song with Bey in 2009 on Saturday Night Live) happened at the tennis tournament on Wednesday and was captured by The Cauldron.
The pair were sitting in the Emirates Suite as they watched Roger Federer take on Richard Gasquet. The dance must have been lucky for the Swiss champ, who won in straight sets to move onto the semifinals.
Timberlake and Fallon will hopefully pull out some more dance moves when the singer appears on The Tonight Show later on Wednesday. The show Tweeted a pic that hinted at a History of Rap Part 6.