| Women's singles | |
|---|---|
| 2023 Surbiton Trophy | |
| Champion |  Yanina Wickmayer |
| Runner-up |  Katie Swan |
| Score | 2–6, 6–4, 7–6(7–1) |
Alison Van Uytvanck was the defending champion [1] but chose not to participate.
Yanina Wickmayer won the title, defeating Katie Swan in the final, 2–6, 6–4, 7–6(7–1).
Tatjana Maria (quarterfinals)
Alison Riske-Amritraj (first round) Madison Brengle (first round)
Kimberly Birrell (first round) Jodie Burrage (first round) Elizabeth Mandlik (second round)
Océane Dodin (second round, retired) Katie Boulter (semifinals)| Semifinals | Final | ||||||||||||
| Katie Swan | 6 | 6 | |||||||||||
| WC | Yuriko Miyazaki | 1 | 0 | ||||||||||
| Katie Swan | 6 | 4 | 61 | ||||||||||
| Q | Yanina Wickmayer | 2 | 6 | 77 | |||||||||
| Q | Yanina Wickmayer | 6 | 6 | ||||||||||
| 8 | Katie Boulter | 3 | 2 | ||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 1 | T Maria | 6 | 2 | 6 | |||||||||||||||||||||||
| Q | C Monnet | 4 | 6 | 3 | 1 | T Maria | 6 | 65 | 6 | ||||||||||||||||||
| H Dart | 2 | 6 | 6 | H Dart | 4 | 77 | 4 | ||||||||||||||||||||
| Q | M Kempen | 6 | 4 | 3 | 1 | T Maria | 6 | 3 | 4 | ||||||||||||||||||
 C Zhao | 2 | 0 | K Swan | 3 | 6 | 6 | |||||||||||||||||||||
| K Swan | 6 | 6 | K Swan | 5 | |||||||||||||||||||||||
| Q | M Lumsden | 5 | 6 | 3 | 7 | O Dodin | 3r | ||||||||||||||||||||
| 7 | O Dodin | 7 | 3 | 6 | K Swan | 6 | 6 | ||||||||||||||||||||
| 3 | M Brengle | 62 | 7 | 1 | WC | Y Miyazaki | 1 | 0 | |||||||||||||||||||
| Q | I Lacy | 77 | 5 | 6 | Q | I Lacy | w/o | ||||||||||||||||||||
| A Krueger | 6 | 5 | 1 | S Vickery | |||||||||||||||||||||||
| S Vickery | 2 | 7 | 6 | Q | I Lacy | 3 | 0 | ||||||||||||||||||||
| WC | E Silva | 6 | 6 | WC | Y Miyazaki | 6 | 6 | ||||||||||||||||||||
 M Zacarías | 4 | 4 | WC | E Silva | 4 | 5 | |||||||||||||||||||||
| WC | Y Miyazaki | 3 | 6 | 6 | WC | Y Miyazaki | 6 | 7 | |||||||||||||||||||
| 5 | J Burrage | 6 | 2 | 4 | |||||||||||||||||||||||
| First round | Second round | Quarterfinals | Semifinals | ||||||||||||||||||||||||
| 6 | E Mandlik | 6 | 6 | ||||||||||||||||||||||||
| Q | E Webley-Smith | 3 | 0 | 6 | E Mandlik | 2 | 1 | ||||||||||||||||||||
| WC | N Bains | 3 | 4 | Q | Y Wickmayer | 6 | 6 | ||||||||||||||||||||
| Q | Y Wickmayer | 6 | 6 | Q | Y Wickmayer | 6 | 4 | 77 | |||||||||||||||||||
| Q |  Z Sönmez | 77 | 6 |  D Snigur | 4 | 6 | 64 | ||||||||||||||||||||
| P Hon | 61 | 3 | Q | Z Sönmez | 4 | 6 | 1 | ||||||||||||||||||||
| D Snigur | 6 | 6 | D Snigur | 6 | 2 | 6 | |||||||||||||||||||||
| 4 | K Birrell | 2 | 3 | Q | Y Wickmayer | 6 | 6 | ||||||||||||||||||||
| 8 | K Boulter | 6 | 6 | 8 | K Boulter | 3 | 2 | ||||||||||||||||||||
| O Gadecki | 2 | 1 | 8 | K Boulter | 3 | 6 | 6 | ||||||||||||||||||||
| WC | S Kartal | 6 | 6 | WC | S Kartal | 6 | 3 | 4 | |||||||||||||||||||
 V Hrunčáková | 3 | 2 | 8 | K Boulter | 7 | 6 | |||||||||||||||||||||
| H Watson | 6 | 63 | 66 |  V Golubic | 5 | 2 | |||||||||||||||||||||
| Q | M Inglis | 2 | 77 | 78 | Q | M Inglis | 3 | 5 | |||||||||||||||||||
| V Golubic | 64 | 6 | 6 | V Golubic | 6 | 7 | |||||||||||||||||||||
| 2 | A Riske-Amritraj | 77 | 2 | 4 | |||||||||||||||||||||||
The 1999 Japan Open Tennis Championships women's singles was the women's singles event of the twenty-fifth edition of the Japan Open; a WTA Tier III tournament held in Tokyo, Japan. Ai Sugiyama was the defending champion but lost in the final 6–2, 6–2 against Amy Frazier.
Melanie Oudin was the defending champion, but lost in the first round to Ajla Tomljanović.
Elena Vesnina was the defending champion, but she retired in the second round against Estrella Cabeza Candela.
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María Teresa Torró Flor was the defending champion, but withdrew before the tournament began.
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Monica Niculescu was the defending champion, but lost in the first round to Pauline Parmentier.
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