Philipp Kohlschreiber defeated Denis Istomin 7-5 6-3 in the Metz qualifying round 1 on hard. The upset overturned the form book — Denis Istomin came in leading the head-to-head 5–2. Philipp Kohlschreiber narrowed the head-to-head to 5–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-07-30 | Kitzbuhel | R16 | clay | Denis Istomin | 5-7 6-3 6-1 |
| 2018-06-11 | Stuttgart | R32 | grass | Denis Istomin | 7-6 7-6 |
| 2014-05-26 | Roland Garros | R64 | clay | Philipp Kohlschreiber | 6-3 7-6 6-2 |
| 2014-05-18 | Dusseldorf | SF | clay | Philipp Kohlschreiber | 6-2 4-6 6-4 |
| 2014-04-28 | Munich | R32 | clay | Denis Istomin | 7-5 2-6 6-4 |
| 2011-06-20 | Wimbledon | R128 | grass | Denis Istomin | 4-6 6-3 6-3 6-3 |
| 2010-02-08 | San Jose | QF | hard | Denis Istomin | 6-1 1-6 6-3 |
Averages over each player's completed matches in the selected window (27 vs 71). 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