So what is it? Do American men see grass and think they'll have to mow it?
The U.S. male contingent was down to zero before the second week of Wimbledon even started. If it weren't for John McEnroe in the broadcast booth, American tennis men would go totally unrepresented.
We already know U.S. men can't win on the clay courts of Paris, but now grass, too?
Mr. Flip is guessing it must be something about natural surfaces.
Now, if the green movement ever forces the U.S. Open to make a change from hard courts, this could get even worse.