Sandro Kopp faces Federico Arnaboldi in the M25 Bolzano quarter-final on clay. Sandro Kopp holds the paper edge — ranked #286, a roughly 140-point clay Elo advantage. Recent clay form is closely matched.
Clear favourite · Kopp S. clearly ahead, but no certainty
Calibrated model (out-of-sample validated). Probability is a statistical estimate, not a certainty. How it works.
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.
Averages over each player's completed matches in the selected window (21 vs 30). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Kopp S.: 11 days rest · 2 matches (14d) · Arnaboldi F.: 11 days rest · 1 match (14d). Higher means fresher. About
No previous meetings on record.