Denis Zivkovic
Denis Zivkovic (born September 30, 1987) is an American professional tennis player and competes mainly on the ATP Challenger Tour and ITF Futures, both in singles and doubles. Zivkovic reached his highest ATP singles ranking, No. 292 on March 18, 2013, and his highest ATP doubles ranking, No. 161, on August 5, 2013. Personal. He was born in United States of Serbian descent, but his family moved to Miami when he was seven.