Alexis Boureau defeated Nathan Seateun 6-4 6-0 in the M15 Monastir 40 quarter-final on hard. The upset overturned the form book — Nathan Seateun came in leading the head-to-head 1–0. Alexis Boureau claimed a first win over Nathan Seateun in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-04-16 | France F7 | R16 | hard | Nathan Seateun | 7-5 6-2 |