Rira Kosaka vs Sera NishimotoPrediction, Head-to-Head Results, and Stats
Rira Kosaka and Sera Nishimoto have met 1 time since 2026; Sera Nishimoto leads 1–0. Across all meetings Kosaka has taken 1 sets to Nishimoto's 2. Their most recent meeting: Sera Nishimoto won at Fukui ITF (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kosaka | Nishimoto | ||
|---|---|---|---|---|
| Indicator | Rira Kosaka | Sera Nishimoto | ||
| Wins in straight sets | 100% | 6/6 | 55% | 6/11 |
| Wins a set when losing | 56% | 5/9 | 36% | 4/11 |
| Goes to a deciding set | 33% | 5/15 | 41% | 9/22 |
| Covers −1.5 sets as favorite | 100% | 1/1 | 71% | 5/7 |
| Covers +1.5 sets as underdog | 67% | 6/9 | 46% | 6/13 |
| Tiebreak sets won | 100% | 1/1 | 40% | 2/5 |
| Wins after taking set 1 | 75% | 6/8 | 82% | 9/11 |
| Wins 2-0 after taking set 1 | 75% | 6/8 | 55% | 6/11 |
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: 0 of 1 completed meetings ended in straight sets (Kosaka 0, Nishimoto 0).
Style Matchup
Playing styles and historical archetype record
Kosaka
⚙️ Grinder
Nishimoto
⚙️ Grinder
Matchup analysis
Both Rira Kosaka and Sera Nishimoto are ⚙️ Grinder types. Mirror matchups usually come down to execution, fitness, and surface fit, across 1,350 matches in our dataset the historical split is about even.
Previous meetings
1 career meeting, newest first
May 25, 2026
Fukui ITF
H Hard
Prop Research
Hit rates on common betting markets · Last 90 days
| Outcome | Kosaka | Nishimoto | ||
|---|---|---|---|---|
| Outcome | Rira Kosaka | Sera Nishimoto | ||
| 1 or more | 40% | 2/5 | 60% | 3/5 |
| 3 or more | 0% | 0/5 | 0% | 0/5 |
| 5 or more | 0% | 0/5 | 0% | 0/5 |
| 10 or more | 0% | 0/5 | 0% | 0/5 |
| 15 or more | 0% | 0/5 | 0% | 0/5 |
| 20 or more | 0% | 0/5 | 0% | 0/5 |
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kosaka | Nishimoto |
|---|---|---|
| W-L | 3–5 | 1–4 |
| Avg odds | 2.96 | 4.81 |
| ROI % | -1.8% | -66.0% |
| Units P/L | -0.14u | -3.30u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Kosaka | Nishimoto |
|---|---|---|
| Countries | — | 1 |
| Events | — | 1 |
| Matches | — | 1 |
| Distance | — | — |
| Route | — | POL |
Host country from the tournament each match was played in, over the last 30 days. Route is the order of countries visited; consecutive stops in the same country are shown once. Distance is the great-circle total between host cities, shown only when every stop in the window is geocoded. A rough fatigue signal, not a headline stat.
Common opponents
Results vs. opponents both players faced · Last 12 months
Across 1 shared opponent, both Kosaka and Nishimoto posted a 0% win rate.
| Opponent | Kosaka | Nishimoto |
|---|---|---|
| Gaeul Jang | L 26 36 | L 26 36 |
Recent Form
Last five matches per player
Junhan Zhang
W15 Luan · 2nd Round
Jul 16
Juliet Jia Wen Zhang
Luan 4 ITF · Round of 16
Jul 16
Liuyan An
W15 Luan · 1st Round
Jul 14
Seo Yun Choi
W15 Luan · 1st Round
Jul 8
Salakthip Ounmuang
Luan 2 ITF
Jul 7
Riko Kikawada
Luan 2 ITF
Jul 6
Zixuan Zeng
Luan 2 ITF
Jul 5
Yui Ohwaki
Maanshan 6 ITF
Jun 30
Meiqi Guo
W15 Tianjin · 1st Round
Aug 5
Maria Sholokhova
W15 Astana · 2nd Round
Jul 9
Nina Sozaonova
W15 Astana · 1st Round
Jul 7
Sae Noguchi
W15 Sapporo · 1st Round
Jun 24
Gaeul Jang
W15 Sapporo · 1st Round
Jun 16
Yujin Kim
W15 Fukui · 1st Round
May 27
Yui Chikaraishi
Fukui ITF
May 26
Rira Kosaka
Fukui ITF
May 25
Win rate
Matches, sets and games won · Last 12 months · 15–22 matches
| Metric | Kosaka | Nishimoto |
|---|---|---|
| Matches won | 40% | 50% |
| Sets won | 49% | 49% |
| Games won | 50% | 50% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kosaka | Nishimoto |
|---|---|---|
| ITF W | 0 | 1 |
By surface
Head-to-head record per surface
| Surface | Kosaka | Nishimoto |
|---|---|---|
| Hard | 0 | 1 |
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