The Continental Grip
The Continental Grip is the grip most pros use to serve, volley, slice, and hit overheads, and this is the grip you want to use for those shots as well. It’s also the grip that pros used “back in the day” to hit their forehands, but since the game has changed so much, it is no longer considered an acceptable tennis forehand grip to use if you are a modern student of the game.
Technically, the Continental Grip is where the heel pad and index knuckle of your hitting hand are resting on the second bevel of the tennis racket. In the video above you can see a shot of me holding the racket with a continental grip, and you can see my heel pad and index knuckle resting on the second bevel of the tennis racket handle.