Natsumi Kawaguchi vs Sayaka IshiiPrediction, Head-to-Head Results, and Stats
🇯🇵Natsumi Kawaguchi
#401 · 23 yrs · Left-Handed
1 meeting · sets 2–0
🇯🇵Sayaka Ishii
#775 · 20 yrs
Natsumi Kawaguchi and Sayaka Ishii have met 1 time since 2026; Natsumi Kawaguchi leads 1–0. Across all meetings Kawaguchi has taken 2 sets to Ishii's 0. Their most recent meeting: Natsumi Kawaguchi won at W100 Takasaki (2026).
Spread & Straight-Sets Form
Completed best-of-3 matches · Last 12 months
| Indicator | Kawaguchi | Ishii | ||
|---|---|---|---|---|
| Indicator | Natsumi Kawaguchi | Sayaka Ishii | ||
| Wins in straight sets | 75% | 15/20 | 50% | 5/10 |
| Wins a set when losing | 32% | 6/19 | 17% | 3/18 |
| Goes to a deciding set | 28% | 11/39 | 29% | 8/28 |
| Covers −1.5 sets as favorite | 62% | 8/13 | 20% | 3/15 |
| Covers +1.5 sets as underdog | 55% | 12/22 | 33% | 4/12 |
| Tiebreak sets won | 56% | 5/9 | 25% | 2/8 |
| Wins after taking set 1 | 81% | 17/21 | 88% | 7/8 |
| Wins 2-0 after taking set 1 | 71% | 15/21 | 63% | 5/8 |
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 (Kawaguchi 1, Ishii 0).
Style Matchup
Playing styles and historical archetype record
Kawaguchi
💥 Big Hitter
Ishii
💥 Big Hitter
Matchup analysis
Both Natsumi Kawaguchi and Sayaka Ishii are 💥 Big Hitter types. Mirror matchups usually come down to execution, fitness, and surface fit, across 5,096 matches in our dataset the historical split is about even.
Previous meetings
1 career meeting, newest first
May 20, 2026
W100 Takasaki
H Hard · 1st Round
Prop Research
Hit rates on common betting markets · Last 90 days
| Outcome | Kawaguchi | Ishii | ||
|---|---|---|---|---|
| Outcome | Natsumi Kawaguchi | Sayaka Ishii | ||
| 1 or more | 100% | 4/4 | 56% | 5/9 |
| 3 or more | 25% | 1/4 | 22% | 2/9 |
| 5 or more | 0% | 0/4 | 0% | 0/9 |
| 10 or more | 0% | 0/4 | 0% | 0/9 |
| 15 or more | 0% | 0/4 | 0% | 0/9 |
| 20 or more | 0% | 0/4 | 0% | 0/9 |
Player ROI
Hypothetical if you put 1u on each player to win every one of their matches · Last 90 days
| Metric | Kawaguchi | Ishii |
|---|---|---|
| W-L | 1–2 | 5–7 |
| Avg odds | 2.31 | 2.09 |
| ROI % | -59.7% | -38.2% |
| Units P/L | -1.79u | -4.58u |
Small sample: ROI stabilizes with more matches; fewer than 10 in the window is noisy.
Travel
Last 30 days
| Metric | Kawaguchi | Ishii |
|---|---|---|
| Countries | 1 | 3 |
| Events | 1 | 3 |
| Matches | 1 | 6 |
| Distance | — | — |
| Route | USA | NED → AUT → EGY |
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
Kawaguchi has a higher win rate against shared opponents (60% vs Ishii's 40%).
| Opponent | Kawaguchi | Ishii |
|---|---|---|
| Rina Saigo | W 76 64 | L 36 06 |
| Yuno Kitahara | L 57 64 36 | W 76 36 62 |
| Kyoka Okamura | W 63 62 | L 46 36 |
| Elena Micic | W 26 76 60 | L 36 57 |
| Yuhan Wang | L 67 26 | W 63 63 |
Recent Form
Last five matches per player
Priska Madelyn Nugroho
W15 Tianjin · 1st Round
Aug 25
Ya Yi Yang
W35 Taipei · 2nd Round
Jun 25
Yishuang Lin
Taipei 3 ITF · Round of 32
Jun 23
Yu Chen Lin
W35 Taipei · 1st Round
Jun 23
Yuno Kitahara
W35 Taipei · 1st Round
Jun 16
Valentina Ryser
W100 Takasaki · 2nd Round
May 22
Sayaka Ishii
W100 Takasaki · 1st Round
May 20
Momoko Kobori
W75 Kurume · Quarterfinals
May 15
Alice Ferlito
W15 Torello · 2nd Round
Aug 27
Neus Torner Sensano
W15 Torello · 1st Round
Aug 26
Juliana Giaccio
W15 Logrono · Quarterfinals
Aug 21
Valentina Losciale
W15 Logrono · 2nd Round
Aug 20
Jordina Font
W15 Logrono · 1st Round
Aug 19
Amelia Rajecki
W35 Roehampton · 1st Round
Aug 5
Rina Saigo
W35 Aldershot · Quarterfinals
Jul 31
Hikaru Sato
W35 Aldershot · 2nd Round
Jul 30
Win rate
Matches, sets and games won · Last 12 months · 28–39 matches
| Metric | Kawaguchi | Ishii |
|---|---|---|
| Matches won | 51% | 36% |
| Sets won | 52% | 36% |
| Games won | 51% | 46% |
Record by tier
Head-to-head record by tournament tier
| Stage | Kawaguchi | Ishii |
|---|---|---|
| ITF W100 | 1 | 0 |
By surface
Head-to-head record per surface
| Surface | Kawaguchi | Ishii |
|---|---|---|
| Hard | 1 | 0 |
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