Has anyone seen this...?
From Steve Tignor's column over at tennis.com:
With the rise of Hewitt, Nadal, Monfils, Sharapova, and various other youngsters, fist-pumping and exhibiting your intensity hasbeen turned into a mental tactic. (I saw a photo recently of Anna-Lena Groenefeld where she was holding up a note on court that read, “Pump fist.”) It’s not done specifically to enrage the opponent, though that is a common byproduct, but to make your desire a tangible part of a match.
"If you practice for ten years, you may begin to please yourself, after 20 years you may become a performer and please the audience, after 30 years you may please even your guru, but you must practice for many more years before you finally become a true artist—then you may please even God." --Ali Akbar Khan, 1922-2009