2021 Halle Open – Doubles

Kevin Krawietz and Horia Tecău defeated Félix Auger-Aliassime and Hubert Hurkacz in the final, 7–6(7–4), 6–4, to win the doubles tennis title at the 2021 Halle Open. It was their first title as a team.

Raven Klaasen and Michael Venus were the defending champions from when the event was last held in 2019, but they did not defend their title together. Klaasen played alongside Ben McLachlan but lost in the second round to Andrés Molteni and Guido Pella. Venus played alongside Tim Pütz but lost in the semifinals to Auger-Aliassime and Hurkacz.

Seeds
• # Ivan Dodig / 🇸🇰 Filip Polášek (second round)

• # 🇵🇱 Łukasz Kubot / 🇫🇷 Édouard Roger-Vasselin (second round)

• # 🇩🇪 Kevin Krawietz / 🇷🇴 Horia Tecău (champions)

• # Wesley Koolhof /  Jean-Julien Rojer (second round)

• # 🇩🇪 Tim Pütz / 🇳🇿 Michael Venus (semifinals)

• # 🇧🇪 Sander Gillé / 🇧🇪 Joran Vliegen (semifinals)

• # Raven Klaasen / 🇯🇵 Ben McLachlan (second round)

• # 🇦🇹 Oliver Marach / 🇵🇰 Aisam-ul-Haq Qureshi (second round)

Seeds
• # 🇺🇸 Evan King / 🇺🇸 Hunter Reese (first round)

• # 🇸🇪 André Göransson / 🇺🇸 Sebastian Korda (first round)

Qualifiers

 * 1) 🇩🇪 Daniel Masur / 🇩🇪 Rudolf Molleker

Lucky losers

 * 1) 🇩🇪 Yannick Hanfmann / 🇩🇪 Dominik Koepfer