Rira Kosaka vs Yan Sr ZhangPrediction, Head-to-Head Results, and Stats
Rira Kosaka and Yan Sr Zhang have met 1 time since 2026; Yan Sr Zhang leads 1–0. Across all meetings Kosaka has taken 1 sets to Zhang's 2. Their most recent meeting: Yan Sr Zhang won at Sapporo 2 ITF (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kosaka | Sr Zhang | ||
|---|---|---|---|---|
| Indicator | Rira Kosaka | Yan Sr Zhang | ||
| Wins in straight sets | 100% | 6/6 | 50% | 2/4 |
| Wins a set when losing | 56% | 5/9 | 33% | 1/3 |
| Goes to a deciding set | 33% | 5/15 | 43% | 3/7 |
| Covers −1.5 sets as favorite | 100% | 1/1 | 0% | 0/1 |
| Covers +1.5 sets as underdog | 67% | 6/9 | 100% | 1/1 |
| Tiebreak sets won | 100% | 1/1 | 0% | 0/1 |
| Wins after taking set 1 | 75% | 6/8 | 80% | 4/5 |
| Wins 2-0 after taking set 1 | 75% | 6/8 | 40% | 2/5 |
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. Small sample — read with care. Head-to-head: 0 of 1 completed meetings ended in straight sets (Kosaka 0, Sr Zhang 0).
Previous meetings
1 career meeting, newest first
Jun 25, 2026
Sapporo 2 ITF
H Hard · Round of 16
Prop Research
Hit rates on common betting markets · Last 90 days
| Outcome | Kosaka | Zhang | ||
|---|---|---|---|---|
| Outcome | Rira Kosaka | Yan Sr Zhang | ||
| 1 or more | 40% | 2/5 | 0% | 0/0 |
| 3 or more | 0% | 0/5 | 0% | 0/0 |
| 5 or more | 0% | 0/5 | 0% | 0/0 |
| 10 or more | 0% | 0/5 | 0% | 0/0 |
| 15 or more | 0% | 0/5 | 0% | 0/0 |
| 20 or more | 0% | 0/5 | 0% | 0/0 |
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kosaka | Zhang |
|---|---|---|
| W-L | 3–5 | 1–1 |
| Avg odds | 2.96 | 3.01 |
| ROI % | -1.8% | -38.5% |
| Units P/L | -0.14u | -0.77u |
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
Across 1 shared opponent, both Kosaka and Zhang posted a 100% win rate.
| Opponent | Kosaka | Zhang |
|---|---|---|
| Riko Kikawada | W 61 62 | W 63 62 |
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
Daria Khomutsianskaya
Istanbul 10 ITF
Jul 13
Arina Arifullina
Istanbul 10 ITF
Jul 12
Rira Kosaka
Sapporo 2 ITF · Round of 16
Jun 25
Ayumi Miyamoto
Sapporo ITF · Quarterfinals
Jun 19
Miyu Nishiwaki
Sapporo ITF · Round of 16
Jun 18
Riko Kikawada
Sapporo ITF · Round of 32
Jun 17
Peangtarn Plipuech
Wuning 4 ITF
Jun 7
Win rate
Matches, sets and games won · Last 12 months · 7–15 matches
| Metric | Kosaka | Zhang |
|---|---|---|
| Matches won | 40% | 57% |
| Sets won | 49% | 53% |
| Games won | 50% | 52% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kosaka | Zhang |
|---|---|---|
| ITF W | 0 | 1 |
By surface
Head-to-head record per surface
| Surface | Kosaka | Zhang |
|---|---|---|
| Hard | 0 | 1 |
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