2021 Nur-Sultan Challenger II

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.

Seeds

 * 1 Rankings are as of 22 February 2021.

Other entrants
The following players received wildcards into the singles main draw:
 * 🇰🇿 Aleksandr Nedovyesov
 * 🇰🇿 Timofey Skatov
 * 🇰🇿 Denis Yevseyev

The following players received entry from the qualifying draw:
 * 🇷🇺 Alibek Kachmazov
 * 🇺🇦 Vladyslav Manafov
 * 🇬🇧 Ryan Peniston
 * Wu Tung-lin

The following players received entry as lucky losers:
 * 🇺🇸 Ulises Blanch
 * 🇩🇪 Julian Lenz

Singles

 * 🇨🇿 Tomáš Macháč def. 🇦🇹 Sebastian Ofner 4–6, 6–4, 6–4.

Doubles

 * 🇺🇸 Nathaniel Lammons / 🇺🇸 Jackson Withrow def. 🇺🇸 Nathan Pasha / 🇺🇸 Max Schnur 6–4, 6–2.