O2 World (stylised as O₂ World) (for sponsorship reasons to be rebranded into Mercedes-Benz Arena from July 2015 ), is a multi-use indoor arena in the Friedrichshain neighborhood of Berlin, Germany, that opened in September 2008. Developed by Anschutz Entertainment Group, it was named O2 World, when O2 Germany purchased the naming rights. With a capacity of 17,000 people, it is home to the Eisbären Berlin ice hockey club and the ALBA Berlin basketball team, and is used for other ice hockey, basketball and handball matches as well as concerts. The surrounding area will be filled with various entertainment venues including a cinema, a casino, a hotel and various bars and restaurants. The arena hosted the 2008–09 Euroleague Final four.