Istanbul Open

{{Infobox tennis tournament

| name = Istanbul Open

| type = defunct

| current =

| logo =

| founded = 2015

| abolished = 2018

| editions = 4

| city = Istanbul

| country = Turkey

| venue = Koza World of Sports

| surface = Clay / outdoor

| category = ATP World Tour 250 series

| draw = 28S / 16D / 32Q

| prize money = €439,405

| website = {{url|http://istanbulopen.org/}}

}}

The Istanbul Open (also known as the TEB BNP Paribas Istanbul Open for sponsorship purposes) 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 250 Series. The tournament was played on outdoor clay courts.{{cite web | url=https://www.atptour.com/en/tournaments/istanbul/7163/overview | title=ATP tournament info | access-date=29 April 2019}} 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.{{cite web |title=ATP 2019 calendar: Córdoba replaces Quito and the Istanbul tournament disappears |url=https://www.barcelonaopenbancsabadell.com/en/news/atp-2019-calendar-cordoba-replaces-quito-and-istanbul-tournament-disappears?language=ca |website=Barcelona Open Banc Sabadell |date=13 November 2018 |access-date=29 April 2019 |archive-date=30 April 2019 |archive-url=https://web.archive.org/web/20190430032345/https://www.barcelonaopenbancsabadell.com/en/news/atp-2019-calendar-cordoba-replaces-quito-and-istanbul-tournament-disappears%3Flanguage%3Dca |url-status=dead }}{{cite web |author1=Luigi Gatto |title=ATP 2019 Calendar released: Istanbul is not there! |url=https://www.tennisworldusa.org/tennis/news/Tennis_Stories/51517/atp-2019-calendar-released-istanbul-is-not-there/ |website=Tennis World |date=31 January 2018}}