Originally Posted by pvaudio
I think control is the ability to put the ball where you want it. Strings which are too powerful will simply make the ball sail long, strings which are too spinny will make the ball land short. In other words, lets you hit whatever shot you wish, and if you miss it, it's your fault.
Its a tough subject to really dive into, since it has different meaning for different players I think. A lot of people would say that they "control" the placement of the shot via how much spin the put on the ball, a shot deep in the court still would have spin, just like a short shot, just maybe not as much. But then again, people could also say that for them "control" would be how much pace they generate on the shot which allows them place the ball and alter the depth and angles. Touchy subject, sorta hard to narrow it down.