Right now I'm playing with a Wilson leather grip and 1 Tournagrip. I got a blister though. Consider I'm a lefty. Pointing my fingers straight up and staring at my palm, the blister is on the right hand side between the base of my pinkey and the base of my wrist. I got it on my 1h backhand. I use an Eastern grip. The blister is right where one of the bevels on the butt meets my hand. Needless to say, it's really bugging me. I heard Sampras stopped using leather grips because his hand would blister. Therefore, he switched to the Wilson Cushin-Aire Sponge grip. Anybody ever do the same? I'm considering doing that and playing with Wilson Pro Overgrips for a while. I imagine their extra tack will cut down on the slippage, allowing my blister to heal. Once healed, I would go back to the Tournagrip. Thanks for reading and hopefully replying with some input.