Roger Federer may have the most Grand Slam titles, but John McEnroe says Rafael Nadal is building a resume that could make him the greatest of all time.
Federer has won a record 16 Grand Slams, seven more than Nadal. Yet Nadal has a 14-7 record against Federer. Nadal has won the Davis Cup title with Spain and an Olympic singles gold medal - two achievements that have eluded Federer.
McEnroe, speaking at a sports conference in Doha, said ''there is an argument to be made that Rafael Nadal may be the greatest player eventually, even possibly now.''
McEnroe adds that the 29-year-old Swiss star could add a ''couple more'' to that tally.
Former Swedish great Bjorn Borg said Federer is still the greatest, although ''Rafa has the chance to be the greatest player'' if he stays healthy.
