Monfils jumped up and produced some unexpected dancing to Push the Feeling On by Nightcrawlers.
He has previously alluded to being able to dance back in 2011 but he has shown the world now.
"Maybe [the dancing is] more from my dad because my dad danced a lot," Monfils said at a press conference in 2011. "But it just is fun because I like to dance... and I have a lot of dancer friends."
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