
Jan Choinski faces Botic Van De Zandschulp in the US Open round of 128 on hard. Botic Van De Zandschulp is the paper favourite — ranked #71, defending last year's round of 128, a roughly 140-point hard Elo advantage — but Jan Choinski has won their only previous meeting, though none on hard.
Clear favourite · Van De Zandschulp B. clearly ahead, but no certainty
Calibrated model · 65% favourite accuracy (2025–26, out-of-sample). 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 (30 vs 25). 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
Choinski J.: 5 days rest · 1 match, 30 games (7d) · Van De Zandschulp B.: 2 days rest · 3 matches, 50 games (7d). Higher means fresher. About
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2018-01-22 | Germany F2 | QF | carpet | Jan Choinski | 6-1 6-3 |
Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About