Rafael Nadal should be more swagger-y, John McEnroe says. And he knows from swagger. (Anja Niedringhaus / AP)

John McEnroe, the guy who brought such classics as “you cannot be serious” and “you guys are the absolute pits of the world” to the sports lexicon 20 years ago this Wimbledon, would like to see Rafael Nadal, the world’s No. 1 player, adopt a bit of swagger.

You’d think that he cannot be serious, but he is.

“I'm getting a little bit tired of him continuing to downplay his chances,” McEnroe told the BBC (via AFP). “There is definitely an argument for him not only being the best player at the moment, but the greatest of all time.

“Rafa has won things like the Davis Cup and an Olympic gold medal that Roger Federer hasn't and he is right on his tail in terms of Grand Slam titles, too, so why can't he just say, ‘Look, I'm the best.’ ”