ジョコ躍進の秘密

・・は、ラケットにつけたスマイリーの【振動止め】・・・だったりして。

clipped from www.sun-sentinel.com Few players at 19 have Novak Djokovic's variety of shots, and he's not only a superb talent but a man with a sense of humor, which might explain the round, yellow, smiley-face vibration dampener in his racket.