![Tommy Haas video: What we can learn about sports psychology by watching a German tennis star berate himself. Tommy Haas video: What we can learn about sports psychology by watching a German tennis star berate himself.](https://compote.slate.com/images/f9584e38-8443-442b-a11e-34f6b80b121a.jpg)
Tommy Haas video: What we can learn about sports psychology by watching a German tennis star berate himself.
![Germany's Tommy Haas returns the ball during his semifinal tennis match against Switzerland's Roger Federer at the ATP … | Tennis players, Atp tennis, Tennis match Germany's Tommy Haas returns the ball during his semifinal tennis match against Switzerland's Roger Federer at the ATP … | Tennis players, Atp tennis, Tennis match](https://i.pinimg.com/originals/7b/d9/8a/7bd98a2ddef8101fabd557223d468bef.jpg)
Germany's Tommy Haas returns the ball during his semifinal tennis match against Switzerland's Roger Federer at the ATP … | Tennis players, Atp tennis, Tennis match
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