Sampras is coming to Toronto next month to be inducted in the Rogers Cup Hall of Fame and to play in the Rogers Legends Cup.
The retired tennis star and Federer have both won seven singles titles at the All England Club.
Andy Murray won his first Wimbledon title this month. During a conference call Monday, Sampras called the Scotsman one of the sport's dominant players and the man to beat at the U.S. Open.
But he doesn't see anyone being able to dominate on Wimbledon's grass the way he and Federer did.
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