See main article: 2021 Almaty Challenger II.
Jesper de Jong and Vitaliy Sachko were the defending champions[1] but only Sachko chose to defend his title, partnering Vladyslav Manafov.
Sachko successfully defended his title after defeating Corentin Denolly and Adrián Menéndez Maceiras 6–1, 6–4 in the final.