2023 San Diego Open

The 2023 San Diego Open (also known as the Cymbiotika San Diego Open presented by ResMed for sponsorship reasons) was a women's tennis tournament played on outdoor hard courts. It was the 2nd edition of the women's event, which is a WTA 500 event on the 2023 WTA Tour. It was held at the Barnes Tennis Center in San Diego, United States, from 11 to 16 September 2023. The men's event was discontinued this year following the return of the ATP Tour to China.

Singles

 * 🇨🇿 Barbora Krejčíková def. 🇺🇸 Sofia Kenin 6–4, 2–6, 6–4

Doubles

 * 🇨🇿 Barbora Krejčíková / 🇨🇿 Kateřina Siniaková def. 🇺🇸 Danielle Collins / 🇺🇸 CoCo Vandeweghe 6–1, 6–4

Seeds

 * 1 Rankings are as of 28 August 2023.

Other entrants
The following players received wildcards into the main draw:
 * 🇨🇦 Leylah Fernandez
 * 🇺🇸 Sofia Kenin
 * 🇨🇿 Barbora Krejčíková
 * 🇺🇸 Katie Volynets

The following players received entry from the qualifying draw:
 * 🇺🇸 Louisa Chirico
 * 🇵🇱 Magdalena Fręch
 * 🇺🇸 Emma Navarro
 * 🇺🇸 Clervie Ngounoue
 * 🇨🇴 Camila Osorio
 * Aliaksandra Sasnovich

Withdrawals

 * Victoria Azarenka → replaced by 🇺🇸 Alycia Parks
 * 🇺🇸 Coco Gauff → replaced by 🇺🇸 Sloane Stephens
 * 🇺🇸 Madison Keys → replaced by 🇺🇸 Danielle Collins
 * Donna Vekić → replaced by 🇮🇹 Jasmine Paolini

Seeds

 * 1 Rankings are as of 28 August 2023.

Other entrants
The following pair received a wildcard into the doubles main draw:
 * 🇺🇸 Danielle Collins / 🇺🇸 CoCo Vandeweghe