H. Pierre defeated Charlie Robertson 6-7 6-4 13-11 in the M15 Monastir 14 q64 on hard. The upset overturned the form book — Charlie Robertson came in ranked #944, leading the head-to-head 1–0. H. Pierre claimed a first win over Charlie Robertson in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-07-09 | M15 Hillcrest 2 | R16 | hard | Charlie Robertson | 3-6 0-6 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.