Federer's versatility has been described by Jimmy Connors as: "In an era of specialists, you're either a clay court specialist, a grass court specialist, or a hard court specialist... or you're Roger Federer."
Federerovu všestrannost shrnula bývalá světová jednička Jimmy Connors slovy: „V éře specialistů jste buď specialista na antuku, specialista na trávu nebo specialista na tvrdý povrch … a nebo jste Roger Federer“.