2023 Istanbul Challenger

The 2023 Istanbul Challenger was a professional tennis tournament played on hard courts. 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.

Seeds

 * 1 Rankings are as of 28 August 2023.

Other entrants
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:
 * 🇯🇲 Blaise Bicknell
 * 🇸🇪 Leo Borg
 * 🇮🇱 Daniel Cukierman
 * 🇺🇸 Martin Damm
 * 🇹🇷 Marsel İlhan
 * 🇮🇱 Yshai Oliel

Singles

 * 🇧🇦 Damir Džumhur def. 🇸🇰 Lukáš Klein 7–6(7–5), 6–3.

Doubles

 * 🇬🇧 Luke Johnson / 🇹🇳 Skander Mansouri def. Sander Arends / 🇵🇰 Aisam-ul-Haq Qureshi 7–6(7–3), 6–3.