See main article: 2021 Antalya Challenger IV.
Riccardo Bonadio and Giovanni Fonio were the defending champions[1] but withdrew from the tournament before their quarterfinal match.
Hsu Yu-hsiou and Oleksii Krutykh won the title after defeating Sanjar Fayziev and Markos Kalovelonis 6–1, 7–6(7–5) in the final.