Horacio Zeballos defeated Alexandr Dolgopolov 6-3 6-1 in the St. Petersburg round of 16 on carpet. The upset overturned the form book — Alexandr Dolgopolov came in leading the head-to-head 3–1. Horacio Zeballos narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-01-01 | Brisbane | R16 | hard | Alexandr Dolgopolov | 6-1 6-2 |
| 2017-07-17 | Bastad | R16 | clay | Alexandr Dolgopolov | 6-4 6-4 |
| 2017-02-20 | Rio de Janeiro | R16 | clay | Alexandr Dolgopolov | 7-6(4) 4-6 6-4 |
| 2016-08-08 | Los Cabos | R32 | hard | Horacio Zeballos | 6-3 6-3 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About