Level, 1 wins each over 2 singles meetings since 2021. Last meeting on 18/10/2025 at Swiss Indoors Basel - Basel.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 18/10/2025 | Swiss Indoors Basel - Basel | Qualifying 1 | indoor hard | Majchrzak | 4-6 4-6 |
| 27/09/2021 | Sofia Open - Sofia | Qualifiers | indoor hard | Portero | 6-4 7-6(4) |
| indoor hard | Majchrzak 1 - 1 Portero |
| 2025 | Majchrzak 1 - 0 Portero |
| 2021 | Majchrzak 0 - 1 Portero |
161 wins, 97 losses since 2021 (62.4%).
Last matches: D V D D D
171 wins, 177 losses since 2021 (49.1%).
Last matches: D V V V V
Level, 1 wins each over 2 singles meetings since 2021.
On 18/10/2025, at Swiss Indoors Basel - Basel (Qualifying 1): Kamil Majchrzak won 4-6 4-6.