Roger Federer of Switzerland returns the ball to Tomas Berdych of Czech Republic during the final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Saturday, March 1, 2014. (AP Photo/Kamran Jebreili)

Mideast Emirates Dubai Tennis Championships

Roger Federer of Switzerland returns the ball to Tomas Berdych of Czech Republic during the final match of the Dubai Duty Free Tennis Championships in Dubai, United Arab Emirates, Saturday, March 1, 2014. (AP Photo/Kamran Jebreili)

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