Bad habits: elbow, step, grip, knees

The main points in 30 seconds

No words needed: four common beginner mistakes, and what right looks like.

• Elbow: before an overhead shot don't let it drop below the shoulder — lift it and turn the body.
• Step: don't stand on straight legs — weight on the balls of the feet, ready to push off.
• Grip: don't hold the racket like a frying pan — take it as if shaking hands.
• Knees: don't stand upright when receiving — bend the knees and get lower.