
Marin Cilic defeated John Isner 4-6 6-2 6-7 7-6 9-7 in the Australian Open round of 32 on hard. The result followed the form book — Marin Cilic came in leading the head-to-head 8–3, defending last year's semi-final. Marin Cilic extended the head-to-head to 9–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-08-26 | US Open | R32 | hard | Marin Cilic | 7-5 3-6 7-6(6) 6-4 |
| 2018-11-12 | Tour Finals | RR | hard | Marin Cilic | 6-7(2) 6-3 6-4 |
| 2018-03-19 | Miami Masters | R16 | hard | John Isner | 7-6(0) 6-3 |
| 2017-06-19 | Queen's Club | R32 | grass | Marin Cilic | 7-5 6-3 |
| 2017-05-15 | Rome Masters | QF | clay | John Isner | 7-6(3) 2-6 7-6(2) |
| 2016-10-31 | Paris Masters | SF | hard | John Isner | 6-4 6-3 |
| 2016-07-15 | Davis Cup WG QF: USA vs CRO | RR | hard | Marin Cilic | 7-6(9) 6-3 6-4 |
| 2015-06-29 | Wimbledon | R32 | grass | Marin Cilic | 7-6(4) 6-7(6) 6-4 6-7(4) 12-10 |
| 2014-02-17 | Delray Beach | SF | hard | Marin Cilic | 7-6(5) 6-3 |
| 2013-03-20 | Miami Masters | R32 | hard | Marin Cilic | 6-3 7-6(3) |
| 2012-05-06 | Madrid Masters | R32 | clay | Marin Cilic | 7-6(4) 7-6(3) |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About
Averages over each player's completed matches in the selected window (199 vs 200). ATP, WTA & Challenger.