Fenerbahçe International Sports Complex Ülker Sports Arena is a multi-purpose indoor arena that is located in Ataşehir, Istanbul, Turkey. The arena is owned and operated by Fenerbahçe S.K. The arena has a capacity of 15,000 people for concerts and 13,059 for basketball games, and it has hosted national and international sports events, such as basketball, volleyball, wrestling, and weightlifting; as well as concerts and congresses.