Vaidisova hitting a backhand return viewed from the side.

Vaidisova hitting a serve viewed from the rear.

Vaidisova hitting a smash viewed from the rear.

Tomas Berdych taking a high backhand from behind the baseline

Tomas Berdych hitting a forehand approach, viewed from the side.

Verdasco hitting a sliced backhand viewed from the side.

Verdasco hitting a forehand viewed from the rear.

Fujimoto hitting a serve viewed from the side.

Ginepri hitting a serve viewed from the side.

Haas hitting a backhand return viewed from the rear.

Haas hitting a serve viewed from the side.

Svetlana Kuznetsova hitting a backhand viewed from the rear.

Svetlana Kuznetsova hitting a forehand viewed from the rear.

Jankovic hitting a serve viewed from the front.

Caroline Wozniacki hitting a backhand return viewed from the side.

Caroline Wozniacki hitting a stretched forehand off a low ball viewed from the rear.

Caroline Wozniacki hitting a backhand viewed from the side.

Bartoli hitting an inside-out forehand viewed from the rear.

Bartoli hitting a serve viewed from the rear.

Bartoli hitting a serve viewed from the side.