2021 Rancho Santa Fe Open – Doubles

Kayla Day and Sophia Whittle were the defending champions but chose not to participate.

Katarzyna Kawa and Tereza Mihalíková won the title, defeating Liang En-shuo and Rebecca Marino in the final, 6–3, 4–6, [10–6].

Seeds
• # 🇵🇱 Katarzyna Kawa / 🇸🇰 Tereza Mihalíková (champions)

• # Liang En-shuo / 🇨🇦 Rebecca Marino (final)

• # Conny Perrin / 🇲🇽 Renata Zarazúa (quarterfinals)

• # 🇺🇸 Madison Brengle / 🇦🇺 Maddison Inglis (semifinals)