Louroi Martinez defeated Lars Johann 6-4 6-4 in the M25 Muttenz 1 q16 on clay. The result followed the form book — Louroi Martinez came in leading the head-to-head 1–0. Louroi Martinez extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2021-08-17 | M25 Muttenz 1 | Q16 | clay | Louroi Martinez | 5-7 6-4 10-4 |