See main article: 2021 Svijany Open.
Jonáš Forejtek and Michael Vrbenský were the defending champions[1] but lost in the first round to Tallon Griekspoor and Bart Stevens.
Roman Jebavý and Igor Zelenay won the title after defeating Geoffrey Blancaneaux and Maxime Janvier 6–2, 6–7(6–8), [10–5] in the final.