Jan Kumstat vs Yuichiro InuiPrediction, Head-to-Head Results, and Stats
Jan Kumstat and Yuichiro Inui have met 1 time since 2026; Jan Kumstat leads 1–0. Across all meetings Kumstat has taken 2 sets to Inui's 0. Their most recent meeting: Jan Kumstat won at M25 Ollersbach (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kumstat | Inui | ||
|---|---|---|---|---|
| Indicator | Jan Kumstat | Yuichiro Inui | ||
| Wins in straight sets | 71% | 29/41 | 78% | 7/9 |
| Wins a set when losing | 38% | 6/16 | 21% | 6/29 |
| Goes to a deciding set | 32% | 18/57 | 21% | 8/38 |
| Covers −1.5 sets as favorite | 65% | 24/37 | 22% | 2/9 |
| Covers +1.5 sets as underdog | 67% | 12/18 | 13% | 2/15 |
| Tiebreak sets won | 58% | 11/19 | 25% | 4/16 |
| Wins after taking set 1 | 89% | 33/37 | 64% | 7/11 |
| Wins 2-0 after taking set 1 | 78% | 29/37 | 64% | 7/11 |
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, Inui 0).
Style Matchup
Playing styles and historical archetype record
Kumstat
💥 Big Hitter
Inui
💥 Big Hitter
Matchup analysis
Both Jan Kumstat and Yuichiro Inui are 💥 Big Hitter types. Mirror matchups usually come down to execution, fitness, and surface fit, across 4,120 matches in our dataset the historical split is about even.
Previous meetings
1 career meeting, newest first
Jul 22, 2026
M25 Ollersbach
C Clay · 1st Round
Prop Research
Hit rates on common betting markets · Last 90 days
| Outcome | Kumstat | Inui | ||
|---|---|---|---|---|
| Outcome | Jan Kumstat | Yuichiro Inui | ||
| 1 or more | 100% | 19/19 | 100% | 3/3 |
| 3 or more | 95% | 18/19 | 33% | 1/3 |
| 5 or more | 74% | 14/19 | 0% | 0/3 |
| 10 or more | 37% | 7/19 | 0% | 0/3 |
| 15 or more | 5% | 1/19 | 0% | 0/3 |
| 20 or more | 5% | 1/19 | 0% | 0/3 |
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kumstat | Inui |
|---|---|---|
| W-L | 18–2 | 1–3 |
| Avg odds | 1.62 | 6.61 |
| ROI % | +41.6% | -67.0% |
| Units P/L | +8.31u | -2.68u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Common opponents
Results vs. opponents both players faced · Last 12 months
Kumstat has a higher win rate against shared opponents (100% vs Inui's 0%).
| Opponent | Kumstat | Inui |
|---|---|---|
| Maxim Shin | W 61 64 | L 57 67 |
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
Jordan Chiu
M25 Qian Daohu · 1st Round Qualifying
Oct 11
Maxim Shin
M25 Luan · 2nd Round Qualifying
Oct 5
Xiao Feng Zhou
M25 Luan · 1st Round Qualifying
Oct 4
Seongchan Hong
M25 Sapporo · 1st Round
Sep 9
Yu Tanaka
M25 Sapporo · 3rd Round Qualifying
Sep 7
Junnosuke Masuda
M25 Sapporo · 1st Round Qualifying
Sep 6
Jan Kumstat
M25 Ollersbach · 1st Round
Jul 22
Elias Sumann
M25 Ollersbach · 3rd Round Qualifying
Jul 21
Win rate
Matches, sets and games won · Last 12 months · 38–58 matches
| Metric | Kumstat | Inui |
|---|---|---|
| Matches won | 71% | 24% |
| Sets won | 66% | 29% |
| Games won | 55% | 45% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kumstat | Inui |
|---|---|---|
| ITF M25 | 1 | 0 |
By surface
Head-to-head record per surface
| Surface | Kumstat | Inui |
|---|---|---|
| Clay | 1 | 0 |
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