He has to? If Federer wins does he have to fly to Switzerland to present the medal to the fans too? If Murray wins will he have to present his medal to Great Britain from Buckingham Palace balcony?
Oh wait, guess not, that would be too grandiose for Fed or Muzza, not their style. Fits for Dfaker though.
In the race for No. 1, if Djoker skips Canada, that's a big point loss as he won it last year, while Fed only got to the third round.
I dunno about Federer or Murray but regarding Djokovic,Tipsarevic says that they signed a contract to go to Serbia to present the medals before they should fly to Toronto.
U can read everything here:http://www.thetennisspace.com/opinio...y-other-event/