Rira Kosaka vs Sayuri HataPrediction, Head-to-Head Results, and Stats
Rira Kosaka and Sayuri Hata have met 1 time since 2026; Sayuri Hata leads 1–0. Across all meetings Kosaka has taken 1 sets to Hata's 2. Their most recent meeting: Sayuri Hata won at W15 Toyama (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kosaka | Hata | ||
|---|---|---|---|---|
| Indicator | Rira Kosaka | Sayuri Hata | ||
| Wins in straight sets | 78% | 14/18 | 0% | 0/1 |
| Wins a set when losing | 47% | 9/19 | 0% | 0/4 |
| Goes to a deciding set | 35% | 13/37 | 20% | 1/5 |
| Covers −1.5 sets as favorite | 33% | 1/3 | — | |
| Covers +1.5 sets as underdog | 69% | 11/16 | 0% | 0/1 |
| Tiebreak sets won | 33% | 1/3 | 0% | 0/1 |
| Wins after taking set 1 | 84% | 16/19 | — | |
| Wins 2-0 after taking set 1 | 74% | 14/19 | — | |
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, Hata 0).
Previous meetings
1 career meeting, newest first
May 18, 2026
W15 Toyama
H Hard · 1st Round Qualifying
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kosaka | Hata |
|---|---|---|
| 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 | Hata |
|---|---|---|
| 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 2 shared opponents, both Kosaka and Hata posted a 0% win rate.
| Opponent | Kosaka | Hata |
|---|---|---|
| Yui Ohwaki | L 63 46 710 | L 36 06 |
| Moeka Miyata | L 36 67 | L 16 67 |
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
Yui Ohwaki
W15 Yeongwol · 1st Round Qualifying
Sep 6
Honori Koyama
W15 Yeongwol · 1st Round Qualifying
Aug 30
Moeka Miyata
W15 Toyama · 3rd Round Qualifying
May 19
Rira Kosaka
W15 Toyama · 1st Round Qualifying
May 18
Yuzuha Negishi
W35 Miyazaki · 1st Round Qualifying
Apr 20
Win rate
Matches, sets and games won · Last 12 months · 5–37 matches
| Metric | Kosaka | Hata |
|---|---|---|
| Matches won | 49% | 20% |
| Sets won | 52% | 18% |
| Games won | 50% | 37% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kosaka | Hata |
|---|---|---|
| ITF W15 | 0 | 1 |
By surface
Head-to-head record per surface
| Surface | Kosaka | Hata |
|---|---|---|
| Hard | 0 | 1 |
Share this matchup
Copy the link to paste in Discord or group chats.