Originally Posted by ben123
i was kind of thinkin a bit the same like "how can he make such powerful shots with ra 50 and 60lbs strung"
Because stiffness/flex actually has relatively little to do with how much power you're getting on your strokes, or is at the very least quite low on a list of variables that includes weight, swingweight, swing TYPE, string, tension, timing, and so on. One could argue that for a guy like Djokovic a more flexible racquet would actually be beneficial due to the fact that he has an EXTREMELY long swing and a more flexible frame would allow him to more effectively pocket the ball/keep it in the stringbed longer than a stiffer frame might. Duh.