2021 Rafa Nadal Open – Doubles

Sander Arends and David Pel were the defending champions but chose not to defend their title.

Karol Drzewiecki and Sergio Martos Gornés won the title after defeating Fernando Romboli and Jan Zieliński 6–4, 4–6, [10–3] in the final.

Seeds
• # 🇲🇽 Hans Hach Verdugo / 🇲🇽 Miguel Ángel Reyes-Varela (semifinals)

• # 🇧🇷 Fernando Romboli / 🇵🇱 Jan Zieliński (final)

• # 🇮🇳 Sriram Balaji / 🇮🇳 Ramkumar Ramanathan (semifinals)

• # 🇵🇱 Karol Drzewiecki / 🇪🇸 Sergio Martos Gornés (champions)