Alejo Lorenzo Lingua Lavallen defeated Mariano Kestelboim 7-5 6-3 in the Buenos Aires CH qualifying round 1 on clay. The upset overturned the form book — Mariano Kestelboim came in ranked #801, leading the head-to-head 3–1, but Alejo Lorenzo Lingua Lavallen had been the form player, winning 5 of their last 10 on clay. Alejo Lorenzo Lingua Lavallen narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-03-28 | M25 Lujan 1 | QF | clay | Mariano Kestelboim | 7-5 6-4 |
| 2025-02-27 | M25 Yerba Buena 1 | R16 | clay | Mariano Kestelboim | 6-3 7-6(8) |
| 2024-05-19 | M15 Neuquen 1 | F | clay | Alejo Lorenzo Lingua Lavallen | 6-3 7-6(2) |
| 2023-09-07 | M15 Olavarria 1 | R16 | clay | Mariano Kestelboim | 6-3 6-2 |
Averages over each player's completed matches in the selected window (132 vs 171). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About