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ATLANTA, GA - JULY 23: Ivo Karlovic of Croatia returns a forehand to Donald Young during the BB&T Atlanta Open at Atlantic Station on July 23, 2018 in Atlanta, Georgia. (Photo by Kevin C. Cox/Getty Images)

ATLANTA, GA - JULY 23:  Ivo Karlovic of Croatia returns a forehand to Donald Young during the BB&T Atlanta Open at Atlantic Station on July 23, 2018 in Atlanta, Georgia.  (Photo by Kevin C. Cox/Getty Images)