Honestly, this tip is everywhere. Any coach or pro who makes a video or writes an article presents this as the most sage and creative tip of all time. In fact, it's not only a tired piece of advice that everyone has heard, it is completely wrong. The backhand is not a left handed forehand. It's a two handed shot. The hands have to work together. Some pros, like Agassi, even think the right arm is the dominant force. If this were really a good piece of advice, we would all be able to hit awesome two handed forehands. Have you ever tried that? The one handed forehand definitely does not lead to a good two handed forehand. This tip needs to die and be replaced by actual helpful instruction.