Lorenzo Giustino defeated Denis Istomin 6-1 6-1 in the Doha Aus Open Qualies qualifying round 1 on hard. The upset overturned the form book — Denis Istomin came in leading the head-to-head 2–1. Lorenzo Giustino narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-01-10 | Doha Aus Open Qualies | Q1 | hard | Lorenzo Giustino | 6-1 6-1 |
| 2017-07-24 | Gstaad | R32 | clay | Denis Istomin | 6-3 6-2 |
| 2016-04-04 | Marrakech | R32 | clay | Denis Istomin | 7-6(1) 6-4 |
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 86). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Giustino L.: 2 days rest · 5 matches, 120 games (7d). Higher means fresher. About