David Guez defeated Jozef Kovalik 6-4 6-4 in the US Open qualifying round of 128 on hard.
Guez D. took it in straight sets.
David Guez beat Jozef Kovalik 6-4 6-4. Umpiry, "David Guez vs Jozef Kovalik — US Open Qualifying Round of 128", https://umpiry.com/match/2015-08-26/guez-vs-kovalik-us-open-q128?utm_source=cite (as of 26 August 2015).