In the video below, he describes using what is most commonly called a hammer grip as opposed to the normal continental grip which spreads the knuckles out across the bevels. With the this grip all the knuckle pads are on or very near bevel 2. This closes the racket face, and also lags the head, which in theory allows for easier access to spin and a longer swing for more power. All without making the swing any more handsy. In researching this, Jack Sock uses this grip and Nadal is pretty close to this. There are pictures of Djokovic in this grip sometimes. Clearly, not everyone uses it. There's a video of a guy criticizing Sock for this grip but I don't think he gets the point. I also see that one handers use this grip sometimes as well. I tried this yesterday for the first time, and it worked well. One obvious drawback is you now have to manage an extra grip. You can't really slice with this grip, or hit a forehand volley. Anyone else use this, or have thoughts on it?