It's no secret why these guys aren't gentlemen anymore...they're all card-carrying spoiled liberals. Just check the public record!
http://www.newsmeat.com/fec/hof.php?#SPORTS-TENNIS
(click names, right-hand column)
Six out of the thousands of tennis players is hardly license to condemn them all. The reason they are not gentlemen any longer is because they are no longer expected to be. Take a look at Tim Henman or Patrick Rafter. Gentlemen through and through.
Thanks for the link. Very interesting.