When i read a thread about short low bouncing balls putaways, I gave the idea of hitting the shot from a self fed ball at mid court, focusing on giving the necesary pace and spin for this shot to be effective... Afterwards, i got my raquet stringed really badly, and I was stuck playing in a tournament, with the tension almost 20 lbs below what i am used at playing with, usually 63 lbs, and it was strung at 44. I started hitting all the balls, as if they were short balls where i dont hit through the ball, but over it. Because of the extra power, all i could do was concentrate on putting spin on the ball. The thing is, whenever I hit a ball below the net level AND falling, i still hit it over it and the ball would go in an upwards trajectory. The raquet head was closed, and my swings were fast. Maybe its my own perception of things, and the raquet was square, but it definitely wasnt open. Why does it go up?