| Doubles | |
|---|---|
| 2021 Antalya Challenger IV | |
| Champions |  Hsu Yu-hsiou  Oleksii Krutykh |
| Runners-up |  Sanjar Fayziev  Markos Kalovelonis |
| Score | 6–1, 7–6(7–5) |
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.
Jakub Paul / 
Bart Stevens (semifinals) Hsu Yu-hsiou / Oleksii Krutykh (champions) Sanjar Fayziev / Markos Kalovelonis (final)
Grigoriy Lomakin / Oleg Prihodko (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | J Paul B Stevens | 6 | 6 | ||||||||||||||||||||||||
| Mick Veldheer Damien Wenger | 7 | 4 | [12] | M Veldheer D Wenger | 3 | 2 | |||||||||||||||||||||
| WC |  S Ağabigün T Altuna | 5 | 6 | [10] | 1 | J Paul B Stevens | 3 | 65 | |||||||||||||||||||
| 3 | S Fayziev M Kalovelonis | 77 | 6 | 3 | S Fayziev M Kalovelonis | 6 | 77 | ||||||||||||||||||||
 Andrey Chepelev E Tiurnev | 64 | 4 | 3 | S Fayziev M Kalovelonis | w/o | ||||||||||||||||||||||
 R Bonadio G Fonio | w/o | R Bonadio G Fonio | |||||||||||||||||||||||||
 D Ajduković  M Zekić | 3 | S Fayziev M Kalovelonis | 1 | 65 | |||||||||||||||||||||||
 C Crețu A Jecan | 6 | 6 | 2 | Y-h Hsu O Krutykh | 6 | 77 | |||||||||||||||||||||
| WC | U Akkoyun M İlhan | 2 | 3 | C Crețu A Jecan | 77 | 4 | [10] | ||||||||||||||||||||
 T Matsui K Uesugi | 6 | 1 | [8] | 4 | G Lomakin O Prihodko | 63 | 6 | [8] | |||||||||||||||||||
| 4 | G Lomakin O Prihodko | 3 | 6 | [10] | C Crețu A Jecan | 77 | 64 | [7] | |||||||||||||||||||
| V Orlov K Sultanov | 2 | Y-h Hsu O Krutykh | 63 | 77 | [10] | ||||||||||||||||||||||
 P Milushev R Shandarov | w/o | P Milushev R Shandarov | 1 | 3 | |||||||||||||||||||||||
| 2 | Y-h Hsu O Krutykh | 6 | 6 | ||||||||||||||||||||||||
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