As the title says... Background: I've been playing often with a friend who used to be really good and still generates lots of topspin and a kickserve that kills my 1HBH. I found that I naturally spin the racquet in my hand to a semiwestern grip on the BH side (possibly even western). That helped a lot, especially as he comes often to the net and I was effectively able to return (or hit passing shots) towards his feet, making contact with the ball somewhere around or above my head height! I can deal with his shots on the FH with my normal Eastern grip, that's probably the one area of the game where I'm at or close to his level. However: is it a good idea to mix grips on the different sides? And if I do it should I hit my BH like that against everyone else, to develop consistency?