Ayumi Koshiishi vs Sijia WeiPrediction, Head-to-Head Results, and Stats
Ayumi Koshiishi and Sijia Wei have met 1 time since 2025; Sijia Wei leads 1–0. Across all meetings Koshiishi has taken 0 sets to Wei's 2. Their most recent meeting: Sijia Wei won at W50 Brisbane 1 (2025).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Koshiishi | Wei | ||
|---|---|---|---|---|
| Indicator | Ayumi Koshiishi | Sijia Wei | ||
| Wins in straight sets | 71% | 5/7 | 77% | 10/13 |
| Wins a set when losing | 43% | 3/7 | 36% | 4/11 |
| Goes to a deciding set | 36% | 5/14 | 29% | 7/24 |
| Covers −1.5 sets as favorite | 75% | 3/4 | 47% | 8/17 |
| Covers +1.5 sets as underdog | 75% | 6/8 | 50% | 3/6 |
| Tiebreak sets won | 100% | 3/3 | 67% | 4/6 |
| Wins after taking set 1 | 78% | 7/9 | 86% | 12/14 |
| Wins 2-0 after taking set 1 | 56% | 5/9 | 71% | 10/14 |
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: 1 of 1 completed meetings ended in straight sets (Koshiishi 0, Wei 1).
Style Matchup
Playing styles and historical archetype record
Koshiishi
👑 The Complete Package
Wei
🏹 Frontrunner
Matchup analysis
👑 The Complete Package vs 🏹 Frontrunner is historically tight (50% vs 50%, 821 matches). Neither style has a clear edge, so form, surface, and the head-to-head matter most.
Previous meetings
1 career meeting, newest first
Nov 14, 2025
W50 Brisbane 1
H Hard · Quarterfinals
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Koshiishi | Wei |
|---|---|---|
| W-L | - | 1–3 |
| Avg odds | - | 1.41 |
| ROI % | - | -74.0% |
| Units P/L | - | -2.96u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Koshiishi | Wei |
|---|---|---|
| Countries | — | 1 |
| Events | — | 2 |
| Matches | — | 3 |
| Distance | — | — |
| Route | — | USA |
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 Koshiishi and Wei posted a 0% win rate.
| Opponent | Koshiishi | Wei |
|---|---|---|
| Yufei Ren | L 62 46 36 | L 57 67 |
Recent Form
Last five matches per player
Sijia Wei
W50 Brisbane 1 · Quarterfinals
Nov 14
Arina Varaksina
W50 Brisbane 1 · 2nd Round
Nov 13
Petra Hule
W50 Brisbane 1 · 1st Round
Nov 11
Kayla Cross
W75 Toronto 1 · 1st Round
Oct 28
Anna Sinclair Rogers
W75 Saguenay 1 · Quarterfinals
Oct 24
Teah Chavez
W75 Saguenay 1 · 2nd Round
Oct 23
Alexandra Vagramov
W75 Saguenay 1 · 1st Round
Oct 21
Misaki Matsuda
W100 Incheon 1 · 1st Round
Sep 23
Jia Jing Lu
W15 Tianjin · 1st Round
Aug 26
Meng Yi Chen
W15 Tianjin · Quarterfinals
Aug 21
Liuyan An
W15 Tianjin · 1st Round
Aug 18
Unknown Player
W15 Maanshan · 1st Round
Jul 1
Yufei Ren
W50 Wuning · 1st Round
Jun 2
Jiaqi Wang
W35 Wuning · 2nd Round
May 28
Juliet Jia Wen Zhang
Wuning 2 ITF · Round of 32
May 27
Junhan Zhang
W35 Wuning · 1st Round
May 27
Win rate
Matches, sets and games won · Last 12 months · 14–24 matches
| Metric | Koshiishi | Wei |
|---|---|---|
| Matches won | 50% | 54% |
| Sets won | 52% | 55% |
| Games won | 48% | 51% |
Record by tier
Head-to-head record by tournament tier
| Stage | Koshiishi | Wei |
|---|---|---|
| ITF W50 | 0 | 1 |
By surface
Head-to-head record per surface
| Surface | Koshiishi | Wei |
|---|---|---|
| Hard | 0 | 1 |
Share this matchup
Copy the link to paste in Discord or group chats.