Jozef Kovalik defeated Sam Groth 3-6 7-6 6-3 in the US Open qualifying round of 128 on hard. The upset overturned the form book — Sam Groth came in defending last year's round of 64.
Kovalik J. came through in three sets.
Kovalik J. and Groth S. faced 1 of the same opponent in the last 12 months. Kovalik J. went 0–1 (0%) against them, Groth S. 0–2 (0%).
Only 1 common opponent — too few for any conclusion. Shown without assessment.
Jozef Kovalik beat Sam Groth 3-6 7-6(4) 6-3. Umpiry, "Jozef Kovalik vs Sam Groth — US Open Qualifying Round of 128", https://umpiry.com/match/2016-08-23/groth-vs-kovalik-us-open-q128?utm_source=cite (as of 23 August 2016).