I'm talking about a deep, high, cross court topspin forehand. It's a very high percentage shot. I'm not saying use it over and over, but when the opponent isn't already moving that way it is a very difficult shot to do anything with and it opens up the court to go hard to the backhand side. Even against a rightie's forehand, if they don't get there and take it early, it forces them to go for a lower percentage shot or give up a short ball. I've noticed even the very good players I've played have trouble doing anything meaningful with it.