Stefan Kozlov defeated Hyeon Chung 6-2 6-2 in the Acapulco qualifying round of 16 on hard.
Kozlov S. took it in straight sets.
Stefan Kozlov beat Hyeon Chung 6-2 6-2. Umpiry, "Stefan Kozlov vs Hyeon Chung — Acapulco Qualifying Round of 16", https://umpiry.com/match/2017-02-25/chung-vs-kozlov-acapulco-q16?utm_source=cite (as of 25 February 2017).