I have a buddy that played D1 tennis and hits a very heavy topspin ball. He takes back the racquet in a very relaxed manner but has fantastic racquet head speed. His racquet of choice is a Prestige Mid which has an 18x20, tight pattern with a full bed of Pro Red Code strung pretty loose-- 52ish max What throws me off is that every time he's tried a more open string pattern, his ball doesn't quite have the same weight or jump to it. His best ball is coming from this tight 18x20. I know that there's a tendency towards producing a "spinnier" ball with an open pattern but could it be that due to his very high rhs, the extra grip/snap from the tighter mains imparts more spin?