Speaking as part of a tour to promote his new book “But Seriouslyâ€, McEnroe said he would place Williams “like 700 in the world†on the men’s circuit.“If she had to just play the circuit — the men’s circuit — that would be an entirely different story,†McEnroe told American broadcaster National Public Radio.
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.â€
He said her rivals would crack under pressure.
“She could overcome some situations where players would choke because she’s been in it so many times, so many situations at Wimbledon, The US Open, etc,†he said.
The ATP Tour rankings only go to the top 500 and Temur Ismailov of Uzbekistan holds down the 500th spot.
Note also that only the top 100 are making a good living (automatic Grand Slam entry), and the second tier (101-200) struggle to make ends meet with travel and coaching, and those lower (200+) are just living a wishful dream.
He then comments that maybe he (at 60) could beat Serena while she's pregnant, and mentions that "If you go look at the times, for example, of the world's fastest females — and you know maybe it will change! "
http://www.npr.org/2017/06/25/534149646/but-seriously-tennis-great-john-mcenroe-says-hes-seeking-inner-peace