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Sayaka Ishii

TennisWTARight-handed

Sayaka Ishii

JapanAge and results

Sayaka Ishii is a tennis player on the WTA Tour who reached a career-high ranking of No. 188 on March 17, 2025.

4 WTA Tour matches

Updated

2026 record0-0Career highNo. 188Mar 17, 2025Agatha's record1-12 graded calls since Oct 1, 2026

About Sayaka Ishii

Born on August 31, 2005, in Tokyo, Japan, Sayaka Ishii plays right-handed with a two-handed backhand. She played her first season as a professional in 2022, and on March 17, 2025, she reached a career-high WTA Tour ranking of No. 188.

Agatha Research DeskUpdated Oct 25, 2026

Match history4

Every WTA Tour, Grand Slam and Olympic main-draw match in our records, newest first. A walkover is listed but never counted in a record.

2026: 2-6

DateTournamentRoundOpponentResultScoreSurface
Oct 25Toray Pan Pacific Open TennisQualifying FinalYulia PutintsevaL6-4, 2-6, 3-6Hard
Oct 24Toray Pan Pacific Open TennisQualifying 1st RoundKyoka OkamuraW6-4, 6-3Hard
Oct 17Japan OpenQualifying FinalMary StoianaL4-6, 5-7Hard
Oct 16Japan OpenQualifying 1st RoundElina AvanesyanW6-3, 0-0 ret. (ret.)Hard
Jul 8Cerity Partners Hall of Fame Open for the Van Alen CupRound 1Kayla CrossL2-6, 3-6Grass
Jun 23WimbledonQualifying 1st RoundKaitlin QuevedoL0-6, 3-6Grass
Jun 7Lexus Ilkley OpenQualifying 1st RoundVendula ValdmannovaL3-6, 1-6Grass
May 30Lexus Birmingham OpenQualifying 1st RoundVendula ValdmannovaL6-3, 2-6, 4-6Grass

How she is doing nowThrough Oct 25

2026 record0-0
Last 103-7LWLWLLLLLWNewest first. Lost her last match.

Agatha on Sayaka Ishii

Every graded call Agatha sealed on her matches since Oct 1, 2026, newest first. Each is 1 unit at its sealed price; the number opens its receipt.

Record1-1Units-0.90u2 graded calls
DateMatchCallPriceResultUnitsReceipt
Oct 17vs Mary StoianaPREDMary Stoiana to win-1000WON+0.10u#1271
Oct 16vs Elina AvanesyanPREDElina Avanesyan to win-500LOST-1.00u#1132

Career

  1. 2024First WTA matchLost to Katerina Siniakova, Tennis in the Land powered by Rocket
  2. 2025Career high No. 188Mar 17, 2025
  3. Mar 19, 2025Latest matchLost to Emma Raducanu, Miami Open

First WTA match

Aug 20, 2024: lost to Katerina Siniakova 7-6, 3-6, 6-7Tennis in the Land powered by Rocket, on hard

Latest match

Mar 19, 2025: lost to Emma Raducanu 2-6, 1-6Miami Open, Round 1, on hard court

ITF finals

ITF: 3 singles finals, 1 won; 3 doubles finals, 1 won. From 2022 to 2026.

Singles

  1. W
    Apr 2024Won the title at ITF Osaka, Japan (W35, hard), beating Stacey Fung 6-1, 3-6, 6-3.
  2. L
    Oct 2023Runner-up at ITF Redding, United States (W25, hard), losing to Iva Jovic 4-6, 2-6.
  3. L
    Jun 2022Runner-up at ITF Monastir, Tunisia (W15, hard), losing to Francesca Curmi 2-6, 6-4, 5-7.

Doubles

  1. L
    Sep 2026Runner-up at ITF Kyoto, Japan (W35, indoor hard) with Kanon Sawashiro, losing to Hiromi Abe and Amelia Rajecki 6-3, 2-6, [7-10].
  2. W
    Jul 2024Won the title at Figueira da Foz Open, Portugal (W100, hard) with Naho Sato, beating Madeleine Brooks and Sarah Beth Grey 7-6(1), 7-5.
  3. L
    Feb 2024Runner-up at Traralgon International, Australia (W35, hard) with Lanlana Tararudee, losing to Mana Kawamura and Liu Fangzhou 7-6(4), 3-6, [11-13].

Most often against

The players she has met most in our records, with the head-to-head.

Vendula Valdmannova2 meetings
0-2Ishii trails

Last: Jun 7, 2026, Lexus Ilkley Open Qualifying 1st Round, lost

Sources and updates

Results and schedules come from Agatha's own records of the WTA Tour.

Updated Nov 12, 2026, 7:21 AM ET. Results and form refresh after every match; biography facts are checked weekly.