That shot has been around for a long time, and a lot of the players practice it. I remember Yannick Noah doing it back in the early 80s, when I used to watch a lot of tennis. I had met Arthur Ashe back in 1974, and really got into the sport (watching!) for a while. I've lost interest in most pro sports over the years. Still, an amazing shot.
"Good judgment comes from experience. Experience comes from bad judgement." - Will Rogers
DW and I - FIREd at 50 (7/06), living off assets