2021 Sofia Open – Doubles

Jamie Murray and Neal Skupski were the defending champions, but chose to compete in San Diego with different partners instead.

Jonny O'Mara and Ken Skupski won the title, defeating Oliver Marach and Philipp Oswald in the final, 6–3, 6–4.

Seeds
• # 🇫🇮 Henri Kontinen / 🇯🇵 Ben McLachlan (first round)

• # 🇧🇦 Tomislav Brkić / 🇷🇸 Nikola Ćaćić (quarterfinals)

• # 🇦🇹 Oliver Marach / 🇦🇹 Philipp Oswald (final)

• # 🇦🇺 Luke Saville / 🇦🇺 John-Patrick Smith (quarterfinals)