Oleksii Krutykh defeated Stefan Kozlov 7-5 6-2 in the Australian Open qualifying round of 128 on hard. The upset overturned the form book — Stefan Kozlov came in ranked #290, defending last year's round of 64.
Krutykh O. took it in straight sets.
Oleksii Krutykh beat Stefan Kozlov 7-5 6-2. Umpiry, "Oleksii Krutykh vs Stefan Kozlov — Australian Open Qualifying Round of 128", https://umpiry.com/match/2023-01-09/kozlov-vs-krutykh-australian-open-q128?utm_source=cite (as of 9 January 2023).