Federer belts out version of Chicago's 'Hard to say I'm sorry'

Roger Federer is certainly on the short list of the greatest tennis players ever, but unfortunately that skill doesn't translate over to his singing game.

The Swiss legend posted a video Friday night of himself with fellow professionals Grigor Dimitrov and Tommy Haas delivering a stirring rendition of Chicago's "Hard to say I'm Sorry/Get Away."

Federer is clearly the most shy of the three when it comes to sharing their singing talents, as he takes on the role of the friend who stands to the side during karaoke, before bursting in for certain key words of the song.

The 17-time Grand Slam champion is through to the Round of 16 at the Australian Open where he will face Kei Nishikori, while Dimitrov faces Richard Gasquet in the Round of 32. Haas retired during his match against Benoit Paire earlier in the week.