Two surprising things Federer doesn't do well

Yes, you read that headline correctly.

Backstage at the Australian Open, top ATP players including Rafael Nadal, Roger Federer, Milos Raonic, Vasek Pospisil, Rajeev Ram, and Raven Klaasen took part in a couple quirky little challenges with games made up by the organizers. Roll tape:

Ram delivers the best line of this wonderfully brief clip, upon being advised of how well Fed did (or did not do) in the challenge: "Well, Federer's not great at everything—just playing tennis."

But that's not all. Federer was joined by fellow Melbourne semifinalist Grigor Dimitrov and longtime pal Tommy Haas for a bit of karaoke. As if that weren't enough, Haas' father-in-law, music legend David Foster, accompanied them on piano for their not-quite-tuneful trio performance:

There you have it, Fed fans. Your man can't be great at everything.

"Just playing tennis," as Ram said—and, you know, wearing a tux and being a great quote, a husband, a father to two sets of twins, a peer-reviewed patron saint of sportsmanship, a competitor and more. And, sure, probably the GOAT.

The tennis gig is going quite well for Federer as he's reached the Australian Open final where he awaits the winner of Rafael Nadal and Grigor Dimitrov.

Follow Jon on Twitter @jonscott9.