| 2023 Istanbul Challenger | |
|---|---|
| Date | 4–10 September |
| Edition | 37th |
| Surface | Hard |
| Location | Istanbul, Turkey |
| Champions | |
| Singles | |
 Damir Džumhur | |
| Doubles | |
 Luke Johnson /  Skander Mansouri | |
The 2023 QNB Finansbank Istanbul Challenger 75. TED Open International Tennis Tournament was a professional tennis tournament played on hardcourts. It was the 37th edition of the tournament which was part of the 2023 ATP Challenger Tour. It took place in Istanbul, Turkey between 4 and 10 September 2023. [1]
| Country | Player | Rank1 | Seed |
|---|---|---|---|
 KOR | Kwon Soon-woo | 104 | 1 |
 NED | Jesper de Jong | 141 | 2 |
 SVK | Lukáš Klein | 155 | 3 |
 CRO | Dino Prižmić | 176 | 4 |
 BEL | Gauthier Onclin | 198 | 5 |
 FRA | Harold Mayot | 204 | 6 |
| BIH | Damir Džumhur | 211 | 7 |
| SVK | Norbert Gombos | 217 | 8 |
The following players received wildcards into the singles main draw:
Tuncay Duran Koray Kırcı Ergi Kırkın The following players received entry from the qualifying draw:
Damir Džumhur def. Lukáš Klein 7–6(7–5), 6–3. Luke Johnson / Skander Mansouri def. Sander Arends / 
Aisam-ul-Haq Qureshi 7–6(7–3), 6–3.
