| Date: | 12–18 July 2021 |
| Edition: | 15th (men) 12th (women) |
| Surface: | Hard |
| Location: | Nur-Sultan, Kazakhstan |
| Category: | ATP Challenger Tour ITF Women's World Tennis Tour |
| Prize Money: | $52,080 (men) $60,000 (women) |
| Champms: |  Max Purcell |
| Champmd: | Hsu Yu-hsiou / Benjamin Lock |
| Champws: |  Mariam Bolkvadze |
| Champwd: |  Alina Charaeva / Maria Timofeeva |
| Before Year: | 2019 |
| After Name: | President's Cup II |
| After Year: | 2021 |
The 2021 President's Cup was a professional tennis tournament played on outdoor hard courts. It was the fifteenth and twelfth editions of the tournament which were part of the 2021 ATP Challenger Tour and the 2021 ITF Women's World Tennis Tour. It took place in Nur-Sultan, Kazakhstan between 12 and 18 July 2021.[1]
| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Russian Federation | Roman Safiullin | 157 | 1 | |
 Uzbekistan | Denis Istomin | 188 | 2 | |
 United Kingdom | Jay Clarke | 230 | 3 | |
| Australia | Max Purcell | 237 | 4 | |
| Borna Gojo | 238 | 5 | ||
 Ukraine | Sergiy Stakhovsky | 242 | 6 | |
 Canada | Peter Polansky | 251 | 7 | |
 France | Hugo Grenier | 256 | 8 |
The following players received wildcards into the singles main draw:
Grigoriy Lomakin Dostanbek Tashbulatov Beibit ZhukayevThe following players received entry from the qualifying draw:
Yan Bondarevskiy Artem Dubrivnyy Oleksii Krutykh Andrey Kuznetsov| Country | Player | Rank1 | Seed | |
|---|---|---|---|---|
| Georgia | Mariam Bolkvadze | 189 | 1 | |
| Russian Federation | Valeria Savinykh | 195 | 2 | |
| Ukraine | Daria Snigur | 203 | 3 | |
 Belarus | Yuliya Hatouka | 260 | 4 | |
 Brazil | Laura Pigossi | 313 | 5 | |
| Russian Federation | Sofya Lansere | 314 | 6 | |
 Thailand | Peangtarn Plipuech | 321 | 7 | |
| Belarus | Anna Kubareva | 333 | 8 |
The following players received wildcards into the singles main draw:
The following players received entry using protected rankings:
Hiroko Kuwata Peangtarn Plipuech Sabina Sharipova Valeriya YushchenkoThe following players received entry from the qualifying draw:
Nigina Abduraimova
Jacqueline Cabaj Awad Angelina Gabueva
Justina Mikulskytė
Viktória Morvayová Ekaterina Shalimova
Anna Sisková Anastasia TikhonovaSee main article: 2021 President's Cup – Men's singles.
Max Purcell def. Jay Clarke 3–6, 6–4, 7–6(8–6).See main article: 2021 President's Cup – Women's singles.
Mariam Bolkvadze def. Valeria Savinykh, 4–6, 6–3, 6–2See main article: 2021 President's Cup – Men's doubles.
Peter Polansky / Sergiy Stakhovsky 2–6, 6–1, [10–7].See main article: 2021 President's Cup – Women's doubles.
Alina Charaeva / Maria Timofeeva def. Evgeniya Levashova / Laura Pigossi, 7–6(7–5), 2–6, [10–6]