Denis Istomin defeated Mikhail Kukushkin 6-2 2-6 6-3 in the Madrid Masters qualifying round 2 on clay. The upset overturned the form book — Mikhail Kukushkin came in leading the head-to-head 5–2. Denis Istomin narrowed the head-to-head to 5–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-09-17 | St. Petersburg | R32 | carpet | Mikhail Kukushkin | 7-5 2-4 RET |
| 2016-02-22 | Dubai | R32 | hard | Mikhail Kukushkin | 7-5 7-6(3) |
| 2016-01-04 | Brisbane | R32 | hard | Mikhail Kukushkin | 6-2 7-5 |
| 2015-09-21 | St. Petersburg | R32 | carpet | Denis Istomin | 7-6(4) 2-6 6-2 |
| 2015-01-11 | Sydney | R32 | hard | Mikhail Kukushkin | 6-3 7-6(1) |
| 2014-06-16 | Eastbourne | R32 | grass | Denis Istomin | 7-6(6) 6-7(7) 6-3 |
| 2012-09-14 | Davis Cup WG PO: KAZ vs UZB | RR | clay | Mikhail Kukushkin | 6-4 6-2 6-7(5) 6-2 |
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 198). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About