Steven Diez defeated Alexey Vatutin 6-3 4-6 6-4 in the Doha Aus Open Qualies qualifying round 1 on hard. The upset overturned the form book — Alexey Vatutin came in ranked #641, leading the head-to-head 2–1. Steven Diez narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2017-05-01 | Istanbul | Q1 | clay | Alexey Vatutin | 7-6 7-6 |
| 2017-04-29 | Istanbul | Q16 | clay | Alexey Vatutin | 7-6(2) 7-6(7) |
| 2015-11-23 | Cyprus F2 | QF | hard | Steven Diez | 6-4 7-6(3) |
Averages over each player's completed matches in the selected window (200 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About