Re: federer's string tension!!!
federer varies his tension between 45 and 52 depending on surface, opponent and weather. with the racket he uses there is no point in having a high tension, because the racket has enough control as it is. lower tensions allow players mores feel, more spin and a little more power. and if you think federer's tension is low, filippo volandri has his rackets strung at 33lbs