John McEnroe and US tennis star Serena Williams
Tennis legend John McEnroe says while he has great respect for Serena Williams as the best of her gender, the 23-time Grand Slam winner would be the 700th ranked player in the men's game.
Speaking as part of a tour to promote his new book "But Seriously", McEnroe said he would place Williams "like 700 in the world" on the men's circuit.
"Best female player ever — no question. If she had to just play the circuit — the men's circuit — that would be an entirely different story," McEnroe said.
The seven-time major winner said the best thing Williams would have going for her on the men's tour would be her mental toughness.
"The reality of what would happen on a given day is Serena could beat some players, I believe, because she is so incredibly strong mentally," he added.
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