I was discussing this with a friend the other day. He said that fed and nadal both use 1/8 grips on their racquets to produce more spin. I do realize that the smaller the grip size the more spin the racquet can produce but it feels uncomfortable. I tried downgrading from a 1/2 to a 3/8's and some parts of my hand were not even touching the racquet. Do fed and nadal use smaller grips than their hands? And if they do how do they hold it so that it doesn't hurt?