Jan Kumstat vs JiSung NamPrediction, Head-to-Head Results, and Stats
Jan Kumstat and JiSung Nam have met 1 time since 2026; Jan Kumstat leads 1–0. Across all meetings Kumstat has taken 2 sets to Nam's 0. Their most recent meeting: Jan Kumstat won at Unicredit Czech Open (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kumstat | Nam | ||
|---|---|---|---|---|
| Indicator | Jan Kumstat | JiSung Nam | ||
| Wins in straight sets | 71% | 29/41 | 80% | 8/10 |
| Wins a set when losing | 38% | 6/16 | 27% | 3/11 |
| Goes to a deciding set | 32% | 18/57 | 24% | 5/21 |
| Covers −1.5 sets as favorite | 65% | 24/37 | 80% | 4/5 |
| Covers +1.5 sets as underdog | 67% | 12/18 | 43% | 6/14 |
| Tiebreak sets won | 58% | 11/19 | 50% | 3/6 |
| Wins after taking set 1 | 89% | 33/37 | 77% | 10/13 |
| Wins 2-0 after taking set 1 | 78% | 29/37 | 62% | 8/13 |
Colored rows are higher-is-better: green above 50%, red below. Favorite/underdog set by book odds; cover rows count only matches with odds on record. Head-to-head: 1 of 1 completed meetings ended in straight sets (Kumstat 1, Nam 0).
Style Matchup
Playing styles and historical archetype record
Kumstat
💥 Big Hitter
Nam
🪃 Counterpuncher
Matchup analysis
💥 Big Hitter vs 🪃 Counterpuncher is historically tight (52% vs 48%, 3,969 matches). Neither style has a clear edge, so form, surface, and the head-to-head matter most.
Previous meetings
1 career meeting, newest first
May 31, 2026
Unicredit Czech Open
C Clay · 1st Round Qualifying
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kumstat | Nam |
|---|---|---|
| W-L | 18–2 | 0–1 |
| Avg odds | 1.62 | 1.93 |
| ROI % | +41.6% | -100.0% |
| Units P/L | +8.31u | -1.00u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Recent Form
Last five matches per player
Juan Pablo Varillas
Como Challenger · 1st Round
Aug 31
Chun-Hsin Tseng
Prague Challenger · Final
Aug 22
Filip Cristian Jianu
Prague Challenger · Semifinals
Aug 21
Maxim Mrva
Prague Challenger · Quarterfinals
Aug 20
Sumit Nagal
Prague Challenger · 2nd Round
Aug 19
Petr Brunclik
Prague Challenger · 1st Round
Aug 18
Marvin Moeller
Hamburg Challenger · Final
Aug 16
Matheus Pucinelli De Almeida
Hamburg Challenger · Semifinals
Aug 15
Luca Castelnuovo
Shanghai Challenger · Quarterfinals
Sep 11
Denis Yevseyev
Shanghai Challenger · 2nd Round
Sep 10
Rei Sakamoto
Shanghai Challenger · 1st Round
Sep 8
Jan Kumstat
Unicredit Czech Open · 1st Round Qualifying
May 31
Laurent Lokoli
Internazionali Di Tennis - Citta'Di Vicenza · 1st Round Qualifying
May 24
Marat Sharipov
Renault Busan Open Tennis Championships · 1st Round Qualifying
Apr 12
Braden Shick
Miyazaki Challenger · 1st Round
Mar 31
Takuya Kumasaka
Koyushokucho Miyazaki Challenger · 1st Round Qualifying
Mar 30
Win rate
Matches, sets and games won · Last 12 months · 21–58 matches
| Metric | Kumstat | Nam |
|---|---|---|
| Matches won | 71% | 48% |
| Sets won | 66% | 49% |
| Games won | 55% | 52% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kumstat | Nam |
|---|---|---|
| ATP Challenger Tour | 1 | 0 |
By surface
Head-to-head record per surface
| Surface | Kumstat | Nam |
|---|---|---|
| Clay | 1 | 0 |
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