Do I dare put a poly in his racket? He plays with a Prince EXO3 Tour Team strung with Solinco Vanquish multi. He hits with only an average amount of topspin, but its still enough to cause quite a bit of string movement. I'm sure people will say don't do it because it will hurt his arm, but I've never been convinced that either rackets or strings hurt peoples arms or shoulders. IMO, elbow and shoulder pain can almost always be connected to bad form. I'm sure there are other juniors out there playing with poly, so I'm just hoping to here from others that can share their experience.