Mariano Kestelboim defeated Guido Ivan Justo 6-3 4-6 6-3 in the Concepcion CH qualifying round 1 on clay. Mariano Kestelboim extended the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-05-18 | M15 Neuquen 1 | SF | clay | Mariano Kestelboim | 7-6(4) 6-2 |
| 2023-09-08 | M15 Olavarria 1 | QF | clay | Guido Ivan Justo | 3-6 6-3 6-1 |
| 2020-02-27 | M25 Cordoba 1 | R16 | clay | Mariano Kestelboim | 6-1 1-0 |
Averages over each player's completed matches in the selected window (199 vs 200). 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