2021 Saint Petersburg Challenger II – Doubles

Christopher Eubanks and Roberto Quiroz were the defending champions but chose not to defend their title.

Jesper de Jong and Sem Verbeek won the title after defeating Konstantin Kravchuk and Denis Yevseyev 6–1, 3–6, [10–5] in the final.

Seeds
• # 🇷🇺 Teymuraz Gabashvili / 🇰🇿 Aleksandr Nedovyesov (first round)

• # 🇺🇸 Nathan Pasha / 🇺🇸 Max Schnur (quarterfinals)

• # 🇺🇸 James Cerretani / 🇨🇦 Adil Shamasdin (first round)

• # Jesper de Jong / Sem Verbeek (champions)