Turkey's First ATP World Tour Event The TEB BNP Paribas Istanbul Open. the first ATP World Tour event in Turkey, debuted in 2015 at the spectacular Koza World of Sports facility, which is promoted as the largest tennis academy in the world. The centre court provides seating for 7,500 people. Two other clay show courts raise available seating to 9,500, and the clubhouse features a fitness centre, spa, swimming pool and restaurant.