Jan Kumstat vs Sumit NagalPrague Round of 16

Prague · CHALLENGER · Round of 16
#347ATP
19 yrs · Right-handed
Last 10 · pre-match
WWWWWWWWWW
2 — 0
Sets
Wednesday, 19 August 2026 ·
clay
CENTER COURT · 2nd on
#239ATP
1543ELO
1538Clay ELO
29 yrs · 178 cm · Right-handed
Last 10 · pre-match
WLLWWWLLWW
Kumstat J.
7-5 6-3
Nagal S.
Kumstat J.
762
Nagal S.
530

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.

Key context

  • Match story: Jan Kumstat closed it out in two sets, 7–5 6–3.

Head to head

No previous meetings on record.

Statistics

This season
1st serve in·Clear edge
56%
71%
1st serve points won·Slight edge
72%
65%
2nd serve points won·Slight edge
58%
50%
Service points won·Slight edge
66%
60%
Return points won·Even
39%
40%
Break points saved·Clear edge
40%
63%
Aces / match·Dominant
6.7
2.1
Double faults / match·Even
2.1
2.4

Averages over each player's completed matches in the selected window (10 vs 22). ATP, WTA & Challenger.

Win Probability

Pre-match · updated 09:50 UTC
Kumstat J.49%
Nagal S.51%
Toss-up
50–58%
Slight edge
58–67%
Clear favourite
67–80%
Strong favourite
80%+

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.

Umpiry Score

Pre-match
6.2
Even matchUmpiry ScorePartial · surface data limited
  • Back-to-back day (−0.5)
6.1
Even matchUmpiry ScorePartial · surface data limited
Form & Matchup
7.0Leads 1–0 on clay
H2H
3.0Trails 0–1 on clay
10.010 of last 10 on clay
Surface form
5.86 of last 10 on clay
10.013-match win streak
Win streak
Fatigue & Travel
0.04 three-setters in 14 days
3-set count
Context
5.0Didn't play here last year
Defending pts
5.0Didn't play here last year

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.

Freshness

Recent load
Freshness·Dominant
45
84

Kumstat J.: 1 day rest · 5 matches, 119 games (7d) · Nagal S.: 2 days rest · 1 match, 23 games (7d). Higher means fresher. About

Conditions

Court speed
Slowlow bounce, long rallies
SlowFast
Weather
23°COvercast
Wind 11 km/hHumidity 65%

Draw