| Doubles | |
|---|---|
| 2021 Nur-Sultan Challenger | |
| Champions |  Denys Molchanov  Aleksandr Nedovyesov |
| Runners-up |  Nathan Pasha Max Schnur |
| Score | 6–4, 6–4 |
There were no defending champions as the last edition of the tournament was canceled due to the COVID-19 pandemic. [1]
Denys Molchanov and Aleksandr Nedovyesov won the title after defeating Nathan Pasha and Max Schnur 6–4, 6–4 in the final.
Denys Molchanov / Aleksandr Nedovyesov (champions) Nathan Pasha / Max Schnur (final)
Julian Lenz / 
Roberto Quiroz (semifinals)
Peter Polansky / Brayden Schnur (quarterfinals)| First round | Quarterfinals | Semifinals | Final | ||||||||||||||||||||||||
| 1 | D Molchanov A Nedovyesov | 6 | 6 | ||||||||||||||||||||||||
| WC | Sagadat Ayap Danil Ozernoy | 3 | 1 | 1 | D Molchanov A Nedovyesov | w/o | |||||||||||||||||||||
| G Lomakin V Manafov | 6 | 2 | [6] |  P Kotov  T-l Wu | |||||||||||||||||||||||
| P Kotov T-l Wu | 3 | 6 | [10] | 1 | D Molchanov A Nedovyesov | 4 | 6 | [10] | |||||||||||||||||||
| 3 | J Lenz R Quiroz | 6 | 710 | 3 | J Lenz R Quiroz | 6 | 3 | [4] | |||||||||||||||||||
I Nedelko  R Peniston | 2 | 68 | 3 | J Lenz R Quiroz | 6 | 6 | |||||||||||||||||||||
M Marterer  B Rola | 4 | 4 |  H Grenier A Müller | 4 | 3 | ||||||||||||||||||||||
| H Grenier A Müller | 6 | 6 | 1 | D Molchanov A Nedovyesov | 6 | 6 | |||||||||||||||||||||
 F Ferreira Silva  T Macháč | 6 | 5 | [7] | 2 | N Pasha M Schnur | 4 | 4 | ||||||||||||||||||||
 D Istomin D Yevseyev | 3 | 7 | [10] | D Istomin D Yevseyev | 6 | 6 | |||||||||||||||||||||
| WC | T Skatov Dostanbek Tashbulatov | 2 | 1 | 4 | P Polansky B Schnur | 0 | 3 | ||||||||||||||||||||
| 4 | P Polansky B Schnur | 6 | 6 | D Istomin D Yevseyev | 6 | 1 | [9] | ||||||||||||||||||||
 A Metreveli D Popko | 6 | 6 | 2 | N Pasha M Schnur | 4 | 6 | [11] | ||||||||||||||||||||
| WC | Yan Bondarevskiy Dominik Palán | 3 | 4 | A Metreveli D Popko | 5 | 65 | |||||||||||||||||||||
| Alt | B Bobrov A Zakharov | 3 | 63 | 2 | N Pasha M Schnur | 7 | 77 | ||||||||||||||||||||
| 2 | N Pasha M Schnur | 6 | 77 | ||||||||||||||||||||||||
Denys Petrovych Molchanov is a Ukrainian tennis player competing on the ATP Challenger Tour. He has won two ATP doubles titles. He has also won 15 ITF singles and 66 doubles titles, 36 of them Challengers. On 5 January 2015 he reached his highest ATP singles ranking of World No. 169, whilst his highest doubles ranking of No. 61 was reached on 30 October 2023. He also played for the Ukraine Davis Cup team. Staff is:
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Denys Molchanov and Aleksandr Nedovyesov were the defending champions and successfully defended their title, defeating Robert Galloway and Alex Lawson 6–4, 7–6(7–2) in the final.
The 2021 Nur-Sultan Challenger was a professional tennis tournament played on indoor hard courts. It was the third edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Nur-Sultan, Kazakhstan between 22 and 28 February 2021.
The 2021 Nur-Sultan Challenger II was a professional tennis tournament played on indoor hard courts. It was the fourth edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Nur-Sultan, Kazakhstan between 1 and 7 March 2021.
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Christopher Eubanks and Roberto Quiroz were the defending champions but chose not to defend their title.
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Zdeněk Kolář and Lukáš Rosol were the defending champions but only Kolář chose to defend his title, partnering Roman Jebavý. Kolář lost in the final to Aleksandr Nedovyesov and Gonçalo Oliveira.
This was the first edition of the tournament.
This was the first edition of the tournament.
Denys Molchanov and Andrei Vasilevski were the defending champions but only Molchanov chose to defend his title, partnering Aleksandr Nedovyesov. Molchanov lost in the semifinals to Sadio Doumbia and Fabien Reboul.
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Denys Molchanov and Aleksandr Nedovyesov were the defending champions but only Molchanov chose to defend his title, partnering Andrey Golubev. Molchanov lost in the final to Sriram Balaji and Andre Begemann.