Denis Kudla defeated Ivo Karlovic 6-7 7-6 7-6 in the Madrid Masters round of 64 on clay. The upset overturned the form book — Ivo Karlovic came in leading the head-to-head 3–1, defending last year's round of 64. Denis Kudla narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-04-09 | Houston | R16 | clay | Ivo Karlovic | 7-5 7-5 |
| 2017-07-17 | Newport | R16 | grass | Ivo Karlovic | 6-4 6-4 |
| 2013-10-14 | Moscow | R32 | hard | Ivo Karlovic | 6-2 6-3 |
| 2011-07-04 | Newport | R32 | grass | Denis Kudla | 7-6(4) 4-6 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 200). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About