I believe he used the flexpoint instinct at the nasdaq-100, or something when he played against Tim Henman. Then at the wimbledon juniors, he was using the flexpoint prestige, and now in his match at the U.S. open, donald was using the flexpoint radical? what is this kid thinking? honestly, isn't it best to just stay with one racket and practice with that throughout the year? i don't know, maybe he really doesn't like the other rackets and just likes to experiment.