WTA · Rank #739

Sayaka Ishii

21yrs Right

56.7%Accuracy

Matches Analyzed

Recent Form

LWWLW

Recent & Upcoming Tap a match for full analysis

ITF Women W50 Nanao Hard ITF Women W50 Nanao (Hard) 3

2 ▴1.33

2 ▴1.33

1 ▾1.7

1 ▾1.7

2 ▴1.04

2 ▴1.04

ITF Women W35 Kyoto Hard ITF Women W35 Kyoto (Hard) 3

1 ▾1.47

1 ▾1.47

2 ▾1.7

2 ▾1.7

2 ▾2.23

U21.5 ▾1.75

ITF Women W15 Torello Hard ITF Women W15 Torello (Hard) 2

1 ▴1.34

1 ▾1.91

1 ▾1.91

ITF Women W15 Logrono Hard ITF Women W15 Logrono (Hard) 3

1 ▾3.5

U21.5 ▴1.62

2 ▴1.12

2 ▴1.12

2 ▾1.02

2 ▾1.02

ITF Women W35 Roehampton Hard ITF Women W35 Roehampton (Hard) 1

1 1.74

O21.5 ▴2.02

ITF Women W35 Aldershot Hard ITF Women W35 Aldershot (Hard) 3

1 ▾1.9

1 ▾1.9

2 1.83

2 1.83

2 ▾2.55

U20.5 ▴1.85

ITF Women W50 Nottingham Hard ITF Women W50 Nottingham (Hard) 1

2 1.25

2 1.25

WTA Newport USA Grass WTA Newport USA (Grass) 1

2 ▾1.55

2 ▾1.55

WTA Wimbledon London Great Britain Qualifying Grass WTA Wimbledon London Great Britain Qualifying (Grass) 1

1 ▾1.3

1 ▾1.3

WTA Ilkley Great Britain Qualifying Grass WTA Ilkley Great Britain Qualifying (Grass) 1

1 ▾1.32

1 ▾1.32

WTA Birmingham Great Britain Qualifying Grass WTA Birmingham Great Britain Qualifying (Grass) 1

2 ▴1.29

2 ▴1.29

Record by surface

Hard

12-11

Grass

0-4

Overall 14-16

Our AI on this player 17 correct of 30

From the matches in our database

Most-played opponents

Natsumi Kawaguchi 2 meetings 1-1 Amelia Rajecki 2 meetings 1-1 Hiromi Abe 2 meetings 0-2 Vendula Valdmannova 2 meetings 0-2

About Sayaka Ishii

Sayaka Ishii is a 21-year-old right-handed professional tennis player, currently ranked world No. 739. The serve is the vulnerable side, at 5.2 double faults per match and 54.7% of first-serve points won. Against serve the numbers sit mid-table — 44.6% of points won, 408.3% of break chances taken. Service games rarely slip away: 547.5% of them are held. The best surface is comfortably hard: 12-11 there, against 0-4 on everything else.

Results keep swinging: 3 up and 2 down across the last 5. The longest match we have on record ran to 35 games, against A. Rajecki. Predictions cover match winner and score, alongside serve, return and break-point statistics. Most recently seen in our data at ITF Women W50 Nanao.

Serve & Return

First Serve %

—

1st Serve Won

—

2nd Serve Won

—

Aces / Match

Double Faults / Match

5.6

Break Pts Saved

—

Break Pts Converted

—

Return Pts Won

45.3%

Service Hold %

—

Total Pts Won

103.2%

Records Last 12 months

Titles

Finals

Semis or better

Events played

Tournament Results

Deepest runs first, not by date

Season by season

2026

2026so far

0–1

Won-lost

Matches

—

Tiebreaks

Aces / Match

Double Faults / Match

First Serve % 57.6%

1st Serve Won 52.9%

2nd Serve Won 32%

Break points won 25%

Break Pts Saved 58.3%

2025

2–5

Won-lost

Matches

1–1

Tiebreaks

1.3

Aces / Match

1.7

Double Faults / Match

First Serve % 64.9%

1st Serve Won 58.9%

2nd Serve Won 43.9%

Break points won 45.5%

Break Pts Saved 43.4%

2024

6–4

Won-lost

Matches

1–1

Tiebreaks

1.5

Aces / Match

5.4

Double Faults / Match

First Serve % 68%

1st Serve Won 66.1%

2nd Serve Won 48.3%

Break points won 46.4%

Break Pts Saved 60.5%

Season totals from the tour feed, singles only. The won-lost line is the tour's own count and can differ from the record under Predictions, which counts the matches we cover. A dash means the season holds nothing to measure that figure from.

Frequently Asked Questions

How accurate are the AI predictions for Sayaka Ishii?

Our model has graded 30 matches involving Sayaka Ishii and got 17 right — a hit rate of 56.7%. The 20 most recent are listed below, each with the pick we made and how it finished.

Who has Sayaka Ishii played most often?

Of the matches we cover, Sayaka Ishii has met Natsumi Kawaguchi most often — 2 times, with a 1-1 record.