The world's number one tennis player Roger Federer returns the ball back from Germany's Tommy Haas during the semi finals of the Men's Dubai Tennis Championships on March 2, 2007. Federer won

Download this stock image: The world's number one tennis player Roger Federer returns the ball back from Germany's Tommy Haas during the semi finals of the Men's Dubai Tennis Championships on March 2, 2007. Federer won the match 6-4 7-5 and will play Russia's Mikhail Youzhny in the finals tomorrow. (UPI Photo/Norbert Schiller) - TXP6HF from Alamy's library of millions of high resolution stock photos, illustrations and vectors.

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The world's number one tennis player Roger Federer returns the ball back from Germany's Tommy Haas during the semi finals of the Men's Dubai Tennis Championships on March 2, 2007. Federer won

2006 federer hi-res stock photography and images - Alamy

History

History

Germany's Tommy Haas returns the ball during his semifinal tennis match against Switzerland's Roger Federer at the ATP Gerry Weber Open tornament in Halle, Westphalia, Germany, Saturday, June 15, 2013. (AP Photo/Martin

Roger Federer 'happy' for Tommy Haas after surprise defeat in Stuttgart, Tennis News

Federer Announces He's Playing Hamburg and Gstaad - Perfect Tennis

Tommy Haas happy to see Roger Federer hungry for more success

Germany's Tommy Haas returns the ball during his semifinal tennis match against Switzerland's Roger Federer at the ATP Gerry Weber Open tornament in Halle, Westphalia, Germany, Saturday, June 15, 2013. (AP Photo/Martin

Tommy Haas Confronts Tennis's Future