Tallon Griekspoor defeated Felix Auger Aliassime 6-4 6-4 in the Mallorca semi-final on grass. The upset overturned the form book — Felix Auger Aliassime came in ranked #4, leading the head-to-head 4–0. Tallon Griekspoor claimed a first win over Felix Auger Aliassime in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2026-02-09 | Rotterdam | QF | hard | Felix Auger Aliassime | 7-6 6-2 |
| 2022-06-06 | s Hertogenbosch | R16 | grass | Felix Auger Aliassime | 7-6 7-6 |
| 2018-08-27 | US Open | Q1 | hard | Felix Auger Aliassime | 7-5 6-3 |
| 2018-08-22 | US Open | Q128 | hard | Felix Auger Aliassime | 7-5 6-3 |
Averages over each player's completed matches in the selected window (80 vs 115). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Griekspoor T.: 12 days rest · 2 matches (14d) · Auger Aliassime F.: 1 day rest · 3 matches, 59 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 grass field, opponent-adjusted over 52 weeks). About