Nikolay Davydenko, of Russia, returns to Adrian Mannarino, of France, during the first round at the Sony Open tennis tournament at Key Biscayne, Fla., Wednesday, March 19, 2014. (AP Photo/Alan Diaz)

Sony Open Tennis

Nikolay Davydenko, of Russia, returns to Adrian Mannarino, of France, during the first round at the Sony Open tennis tournament at Key Biscayne, Fla., Wednesday, March 19, 2014. (AP Photo/Alan Diaz)

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