Rira Kosaka vs Zixuan ZengPrediction, Head-to-Head Results, and Stats
Rira Kosaka and Zixuan Zeng have met 1 time since 2026; Rira Kosaka leads 1–0. Across all meetings Kosaka has taken 2 sets to Zeng's 0. Their most recent meeting: Rira Kosaka won at W15 Luan (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kosaka | Zeng | ||
|---|---|---|---|---|
| Indicator | Rira Kosaka | Zixuan Zeng | ||
| Wins in straight sets | 78% | 14/18 | 0% | 0/1 |
| Wins a set when losing | 47% | 9/19 | 25% | 2/8 |
| Goes to a deciding set | 35% | 13/37 | 33% | 3/9 |
| Covers −1.5 sets as favorite | 33% | 1/3 | — | |
| Covers +1.5 sets as underdog | 69% | 11/16 | 100% | 1/1 |
| Tiebreak sets won | 33% | 1/3 | 100% | 1/1 |
| Wins after taking set 1 | 84% | 16/19 | 0% | 0/2 |
| Wins 2-0 after taking set 1 | 74% | 14/19 | 0% | 0/2 |
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: 1 of 1 completed meetings ended in straight sets (Kosaka 1, Zeng 0).
Style Matchup
Playing styles and historical archetype record
Kosaka
🧱 The Wall
Zeng
🛡️ The Spoiler
Matchup analysis
The 🧱 The Wall archetype wins about 53% vs 🛡️ The Spoiler across 737 matches in our dataset: a stylistic lean toward Rira Kosaka.
The Wall players often use elite returner and low unforced errors to pressure the the spoiler's strong court coverage.
Previous meetings
1 career meeting, newest first
Jul 5, 2026
W15 Luan
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 | Zeng |
|---|---|---|
| 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 | Zeng |
|---|---|---|
| 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
Kosaka has a higher win rate against shared opponents (100% vs Zeng's 50%).
| Opponent | Kosaka | Zeng |
|---|---|---|
| Liuyan An | W 64 62 | L 16 46 |
| Mari Muto | W 62 76 | W 63 63 |
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
Na Ri Kim
W15 Tianjin · 1st Round
Aug 19
Rira Kosaka
W15 Luan · 1st Round Qualifying
Jul 5
Jialan Cai
W15 Maanshan · 2nd Round Qualifying
Jun 29
Monique Barry
W35 Wuning · 2nd Round Qualifying
May 25
Yuqi Liu
W35 Wuning · 1st Round Qualifying
May 24
Hu Yahui
W15 Luan · 1st Round Qualifying
May 10
Lingyou Ge
W15 Luan · 3rd Round Qualifying
May 5
Hu Yahui
W15 Luan · 2nd Round Qualifying
May 4
Win rate
Matches, sets and games won · Last 12 months · 9–37 matches
| Metric | Kosaka | Zeng |
|---|---|---|
| Matches won | 49% | 11% |
| Sets won | 52% | 19% |
| Games won | 50% | 39% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kosaka | Zeng |
|---|---|---|
| ITF W15 | 1 | 0 |
By surface
Head-to-head record per surface
| Surface | Kosaka | Zeng |
|---|---|---|
| Hard | 1 | 0 |
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