2021 Internazionali di Tennis Città di Trieste – Doubles

Ariel Behar and Andrey Golubev were the defending champions but chose not to defend their title.

Orlando Luz and Felipe Meligeni Alves won the title after defeating Antoine Hoang and Albano Olivetti 7–5, 6–7(6–8), [10–5] in the final.

Seeds
• # 🇧🇷 Orlando Luz / 🇧🇷 Felipe Meligeni Alves (champions)

• # 🇫🇷 Antoine Hoang / 🇫🇷 Albano Olivetti (final)

• # 🇫🇷 Dan Added / 🇺🇦 Vitaliy Sachko (semifinals)

• # Martín Cuevas / 🇮🇹 Andrea Pellegrino (quarterfinals)