2020 Oracle Challenger Series – Newport Beach – Women's singles

Bianca Andreescu was the defending champion, but chose not to participate this year.

Madison Brengle won the title, defeating Stefanie Vögele in the final, 6–1, 3–6, 6–2.

Seeds
All seeds received a bye into the second round. • 🇺🇸 Jessica Pegula (quarterfinals)

• 🇺🇸 Taylor Townsend (semifinals)

• 🇺🇸 Christina McHale (quarterfinals)

• 🇩🇪 Tatjana Maria (quarterfinals)

• 🇺🇸 Madison Brengle (champion)

• Stefanie Vögele (final)

• 🇺🇸 Francesca Di Lorenzo (second round)

• 🇺🇸 Nicole Gibbs (third round)

• 🇺🇸 Usue Maitane Arconada (second round)

• 🇺🇸 Allie Kiick (second round)

• Verónica Cepede Royg (third round)

• 🇧🇪 Yanina Wickmayer (third round, retired)

• 🇺🇸 Shelby Rogers (third round)

• 🇺🇦 Anhelina Kalinina (third round)

• 🇺🇸 Robin Anderson (second round)

• 🇺🇸 Varvara Lepchenko (second round)

Seeds
• # 🇯🇵 Eri Hozumi (qualified)

• # 🇺🇸 Quinn Gleason (qualified)

Qualifiers
• # 🇯🇵 Eri Hozumi

• # 🇺🇸 Quinn Gleason