Guido Ivan Justo leads 3 to 1 over 4 singles meetings since 2024. Last meeting on 31/07/2025 at M15 Santiago.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 31/07/2025 | M15 Santiago | Round 2 | clay | Cavallo | 5-7 0-1 |
| 25/07/2025 | M15 Santiago | Quarter-final | clay | Justo | 7-6(8) 6-4 |
| 14/09/2024 | M15 Cordoba | Semi-final | clay | Justo | 3-6 1-6 |
| 14/05/2024 | M15 Neuquen | Round 1 | clay | Justo | 0-6 2-6 |
| clay | Justo 3 - 1 Cavallo |
| 2025 | Justo 1 - 1 Cavallo |
| 2024 | Justo 2 - 0 Cavallo |
166 wins, 99 losses since 2021 (62.6%).
Last matches: D D V D V
53 wins, 61 losses since 2021 (46.5%).
Last matches: D V V V V
Guido Ivan Justo leads 3 to 1 over 4 singles meetings since 2024.
On 31/07/2025, at M15 Santiago (Round 2): Fernando Cavallo won 5-7 0-1.