Federico Delbonis defeated Martin Klizan 6-1 7-6 in the Santiago round of 32 on clay. The upset overturned the form book — Martin Klizan came in leading the head-to-head 3–2. Federico Delbonis narrowed the head-to-head to 3–3.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-04-15 | Monte Carlo Masters | R64 | clay | Martin Klizan | 7-6(3) 7-5 |
| 2018-04-23 | Barcelona | R64 | clay | Martin Klizan | 6-3 6-7(5) 6-4 |
| 2015-02-16 | Rio de Janeiro | R16 | clay | Federico Delbonis | 6-2 6-1 |
| 2014-08-17 | Winston-Salem | R64 | hard | Federico Delbonis | 7-6(5) 6-4 |
| 2014-06-16 | Eastbourne | R32 | grass | Martin Klizan | 6-4 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 (177 vs 96). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About