Gregoire Barrere defeated Quentin Halys 2-6 6-2 6-4 in the Montpellier qualifying round 1 on hard. The upset overturned the form book — Quentin Halys came in ranked #90, leading the head-to-head 2–1. Gregoire Barrere narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-11-04 | Metz | Q2 | hard | Quentin Halys | 6-4 6-2 |
| 2024-07-01 | Wimbledon | Q1 | grass | Quentin Halys | 6-3 6-4 |
| 2023-02-13 | Rotterdam | Q2 | hard | Gregoire Barrere | 6-7(4) 7-6(3) 7-6(1) |
Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.