Istanbul Open

The Istanbul Open was a men's tennis event on the ATP Tour held in the Turkish city of Istanbul. From 2015 to 2018, it was part of the ATP [World Tour 250 series|ATP 250 Series]. The tournament was played on outdoor clay courts. This was the first Turkish ATP World Tour event.
The inaugural tournament was held from 27 April to 3 May 2015 at the "Koza World of Sports" facility, which is promoted as the largest tennis academy in the world. The center court featured a retractable roof and provided seating for 7,500 people. Two other clay show courts raised available seating to 9,500. The tournament was discontinued in 2018.