Rafael Nadal of Spain returns the ball to Tobias Kamke of Germany during the Qatar ATP Open Tennis tournament in Doha, Qatar, Wednesday, Jan. 1, 2014. (AP Photo/Osama Faisal)

Mideast Qatar ATP Open Tennis

Rafael Nadal of Spain returns the ball to Tobias Kamke of Germany during the Qatar ATP Open Tennis tournament in Doha, Qatar, Wednesday, Jan. 1, 2014. (AP Photo/Osama Faisal)

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