| 2021 Amex-Istanbul Challenger II | |
|---|---|
| Date | 13–19 September |
| Edition | 35th |
| Surface | Hard |
| Location | Istanbul, Turkey |
| Champions | |
| Singles | |
 James Duckworth | |
| Doubles | |
 Radu Albot / Alexander Cozbinov | |
The 2021 Amex-Istanbul Challenger II was a professional tennis tournament played on hard courts. It was the 35th edition of the tournament which was part of the 2021 ATP Challenger Tour. It took place in Istanbul, Turkey between 13 and 19 September 2021.
| Country | Player | Rank1 | Seed |
|---|---|---|---|
| AUS
|
James Duckworth | 68 | 1 |
| MDA
|
Radu Albot | 108 | 2 |
 COL
|
Daniel Elahi Galán | 110 | 3 |
 JPN
|
Yasutaka Uchiyama | 123 | 4 |
| AUS
|
Marc Polmans | 148 | 5 |
 RUS
|
Evgeny Donskoy | 152 | 6 |
 UKR
|
Illya Marchenko | 154 | 7 |
 EGY |
The following players received wildcards into the singles main draw:
The following players received entry from the qualifying draw:
Nick Chappell
Christopher Heyman
Laurent Lokoli
Aldin ŠetkićThe following player received entry as a lucky loser:
James Duckworth def. 
Wu Tung-lin 6–4, 6–2. Radu Albot / Alexander Cozbinov def. 
Antonio Šančić / 
Artem Sitak 4–6, 7–5, [11–9].
general
This is the start of the #general chat. #general is a chat channel to discuss anything related to the hub.
