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 | 78% | 14/18 | 50% | 2/4 |
| Wins a set when losing | 47% | 9/19 | 33% | 1/3 |
| Goes to a deciding set | 35% | 13/37 | 43% | 3/7 |
| Covers −1.5 sets as favorite | 33% | 1/3 | 0% | 0/1 |
| Covers +1.5 sets as underdog | 69% | 11/16 | 100% | 1/1 |
| Tiebreak sets won | 33% | 1/3 | 0% | 0/1 |
| Wins after taking set 1 | 84% | 16/19 | 80% | 4/5 |
| Wins 2-0 after taking set 1 | 74% | 14/19 | 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
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 | 3–4 | - |
| Avg odds | 4.13 | - |
| ROI % | -15.4% | - |
| Units P/L | -1.08u | - |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Kosaka | Zhang |
|---|---|---|
| Countries | 3 | — |
| Events | 3 | — |
| Matches | 8 | — |
| Distance | — | — |
| Route | AUT → ECU → POR | — |
Host country from each tournament in the last 30 days, including the current event even when a player arrived on a bye. 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 Zhang posted a 100% win rate.
| Opponent | Kosaka | Zhang |
|---|---|---|
| Riko Kikawada | W 61 62 | W 63 62 |
Recent Form
Last five matches per player
Haruka Kaji
W35 Wagga Wagga · 1st Round
Oct 7
Zoe Theodorakopoulos
W35 Wagga Wagga · 2nd Round Qualifying
Oct 5
Sera Nishimoto
W35 Wagga Wagga · 3rd Round Qualifying
Oct 5
Haruna Arakawa
W35 Wagga Wagga · 1st Round
Sep 30
Remika Ohashi
W35 Wagga Wagga · 3rd Round Qualifying
Sep 29
Shante Lai
W35 Wagga Wagga · 2nd Round Qualifying
Sep 28
Sayaka Ishii
W50 Nanao · 3rd Round Qualifying
Sep 22
Natsuho Arakawa
W50 Nanao · 1st Round Qualifying
Sep 21
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 · 7–37 matches
| Metric | Kosaka | Zhang |
|---|---|---|
| Matches won | 49% | 57% |
| Sets won | 52% | 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 |
Share this matchup
Copy the link to paste in Discord or group chats.