A Closed Stance in tennis is a classic hitting position where the player's body faces sideways.
The player's side is parallel to the baseline, with their back turned towards the opponent. In this stance, the front foot is closer to the net than the back foot.
Players use the closed stance when they have time to set up for the shot. It allows for good weight transfer and power generation. The closed stance works well for groundstrokes hit from the middle of the court.
The Closed Stance Tennis Forehand - Why you still need it! - [Closed Stance][1]
[1]: https://www.youtube.com/watch?v=G5JNxJihGZ8