

Hugo Grenier defeated Jan Choinski 7-5 6-2 in the Rotterdam q16 on hard. The upset overturned the form book — Jan Choinski came in ranked #77. Hugo Grenier extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-02-09 | Rotterdam | Q1 | hard | Hugo Grenier | 7-5 6-2 |
| 2015-09-28 | France F20 | SF | carpet | Jan Choinski | 6-2 6-3 |
Averages over each player's completed matches in the selected window (15 vs 29). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Grenier H.: 3 days rest · 1 match, 30 games (7d) · Choinski J.: 7 days rest · 1 match, 39 games (7d). Higher means fresher. About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About