2021 Heilbronner Neckarcup – Doubles

Kevin Krawietz and Andreas Mies were the defending champions but chose not to defend their title.

Nathaniel Lammons and Jackson Withrow won the title after defeating André Göransson and Sem Verbeek 6–7(4–7), 6–4, [10–8] in the final.

Seeds
• # 🇵🇰 Aisam-ul-Haq Qureshi / 🇧🇾 Andrei Vasilevski (semifinals)

• # Sander Arends / 🇮🇳 Divij Sharan (semifinals)

• # 🇺🇸 Nathaniel Lammons / 🇺🇸 Jackson Withrow (champions)

• # 🇧🇷 Rafael Matos / 🇧🇷 Felipe Meligeni Alves (quarterfinals)