Every time you hit a tennis forehand you choose how you position your feet -- what stance you will use. You can hit a forehand with an open, neutral, or closed stance, but you should stay away from the closed stance if possible. This last stance makes it difficult to rotate your upper body through contact, making it difficult for you to use correct forehand mechanics.
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This video falls under the forehand. When you hit the tennis ball on the dominant side of your body you are hitting a forehand. For example, if you are right handed and the ball is on the right side of your body you'll be hitting a forehand. Forehands tend to be a player's favorite shot and his or her weapon. If you watch a lot of pro tennis, you've probably noticed that most pros do their damage — hit winners and force errors — with their forehands.