Stefan Kozlov of the U.S. serves to Alexander Zvere of Germany at the Australian Open boy's tennis final in Melbourne, Australia, Saturday, Jan. 25, 2014. (AP Photo/Aijaz Rahi)
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Stefan Kozlov of the U.S. serves to Alexander Zvere of Germany at the Australian Open boy's tennis final in Melbourne, Australia, Saturday, Jan. 25, 2014. (AP Photo/Aijaz Rahi)
