GRAS
Grip: How you hold the racket (e.g., Continental, Eastern, Western).
Reach point: The exact location in space where your racket makes contact with the ball, ideally out in front of your body.
Arm action: The complete swing path, including the backswing, acceleration, and follow-through.
Stance: Your physical body position and footwork relative to the court (e.g., open, semi-open, or closed stance).