Jan Lennard Struff defeated Matteo Arnaldi 4-6 6-1 6-4 in the Bergamo CH quarter-final on hard. The upset overturned the form book — Matteo Arnaldi came in ranked #34, defending last year's round of 32. Jan Lennard Struff extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-06-09 | Stuttgart | R32 | grass | Jan Lennard Struff | 6-4 6-4 |
| 2023-10-02 | Shanghai Masters | R64 | hard | Matteo Arnaldi | 6-3 3-6 6-4 |
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
The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.
Struff J.: 6 days rest · 1 match, 34 games (7d) · Arnaldi M.: 13 days rest · 1 match (14d). Higher means fresher. About