James Duckworth defeated Felix Auger Aliassime 7-5 7-6 in the Canada Masters qualifying round 1 on hard. The upset overturned the form book — Felix Auger Aliassime came in ranked #4, leading the head-to-head 3–1. James Duckworth narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-30 | Wimbledon | R128 | grass | Felix Auger Aliassime | 6-2 3-6 6-7(2) 6-4 6-4 |
| 2021-02-08 | Australian Open | R64 | hard | Felix Auger Aliassime | 6-4 6-1 6-2 |
| 2020-01-13 | Adelaide | R16 | hard | Felix Auger Aliassime | 6-3 7-6(0) |
| 2016-07-25 | Canada Masters | Q1 | hard | James Duckworth | 7-5 7-6(3) |
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
Averages over each player's completed matches in the selected window (200 vs 199). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Duckworth J.: 11 days rest · 2 matches (14d) · Auger Aliassime F.: 6 days rest · 1 match, 57 games (7d). Higher means fresher. About