
Jan Kumstat defeated Sumit Nagal 7-5, 6-3 in the Round of 16 at the Prague tournament on clay. Kumstat hit 6 aces and 4 double faults, winning 63% of his first serves and converting 45% of break points. He broke Nagal's serve 5 times, compared to Nagal's 2 breaks.
No previous meetings on record.
Averages over each player's completed matches in the selected window (10 vs 22). ATP, WTA & Challenger.
Toss-up · Too close to call
Calibrated model · 63% 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.
Kumstat J.: 1 day rest · 5 matches, 119 games (7d) · Nagal S.: 2 days rest · 1 match, 23 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