We know that Nadal is 0-2 against Blake, who plays with a 13.4-oz racquet. And now he is 1-2 against Berdych. Anyone have specs on Berdych's racquet? By the way the ball comes off his racquet, I would guess that his racquet is in the 13-oz range. Anyway, it's no secret that a heavier racquet works much better against heavy spin. If Nadal's style becomes more popular on tour, I expect that the heavy-frame players will rise as well, since they are naturally better able to counter high rpm shots.