2021 European Open – Doubles

John Peers and Michael Venus were the defending champions, but chose not to participate this year.

Nicolas Mahut and Fabrice Martin won the title, defeating Wesley Koolhof and Jean-Julien Rojer in the final, 6–0, 6–1.

Seeds
• # Ivan Dodig / 🇧🇷 Marcelo Melo (quarterfinals)

• # 🇫🇷 Nicolas Mahut / 🇫🇷 Fabrice Martin (champions)

• # Wesley Koolhof /  Jean-Julien Rojer (final)

• # 🇧🇪 Sander Gillé / 🇧🇪 Joran Vliegen (first round)