Genaro Alberto Olivieri leads 3 to 2 over 5 singles meetings since 2022. Last meeting on 15/09/2025 at Villa Maria Challenger.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 15/09/2025 | Villa Maria Challenger | Round 1 | clay | Dellien | 3-6 6-1 6-4 |
| 12/03/2025 | Santiago Challenger | Round 2 | clay | Olivieri | 6-3 2-6 7-5 |
| 03/07/2024 | Brasov Challenger | Round 2 | clay | Dellien | |
| 11/08/2023 | Santo Domingo Challenger | Quarter-final | clay | Olivieri | 3-6 3-6 |
| 26/04/2022 | Buenos Aires 2 Challenger | Round 1 | clay | Olivieri | 3-6 6-4 1-6 |
| clay | Olivieri 3 - 2 Dellien |
| 2025 | Olivieri 1 - 1 Dellien |
| 2024 | Olivieri 0 - 1 Dellien |
| 2023 | Olivieri 1 - 0 Dellien |
| 2022 | Olivieri 1 - 0 Dellien |
169 wins, 161 losses since 2021 (51.2%).
Last matches: D D V D V
207 wins, 151 losses since 2021 (57.8%).
Last matches: D D D D D
Genaro Alberto Olivieri leads 3 to 2 over 5 singles meetings since 2022.
On 15/09/2025, at Villa Maria Challenger (Round 1): Murkel Dellien won 3-6 6-1 6-4.