Ergo Arena (Hala Gdańsk-Sopot) is a multi-purpose indoor arena, that was opened in 2010. The boundary between two cities – Sopot and Gdańsk – runs through the very middle of the hall. The arena has a capacity of 11,409 people, for sports events and up to 15,000, with standing places, for concerts. On November 26, Lady Gaga performed during The Monster Ball Tour, with Semi Precious Weapons as her opening act, to more than 12,000 people. It was the first big event to take place in the hall. Sport events, including the 2013 Men's European Volleyball Championship, 2014 IAAF World Indoor Championships and the 2014 FIVB Volleyball Men's World Championship, as well as a part of the 2016 European Men's Handball Championship were held at the arena. For Athletics competition a six-lane, banked 200-meter oval is installed on the arena floor. According to an IAAF press release, the athletics track at the ERGO Arena, the venue for the 2014 IAAF World Indoor Championships, was officially opened for the 2014 season on Sunday 16 February and almost 6,000 people came to get a glimpse of the new track. Italian company Mondo made the indoor portable banked track with a Mondo Super X rubberized surface (13.5mm thick). Mondo's portable tracks can be assembled and disassembled in a matter of days. The company's claw locking mechanism locks the modular track frame in place without the use of screws or bolts, guaranteeing constant clamping force and perfect accuracy from panel to panel, and from installation to installation. Mondo's world-renowned Super X surface has been the world's top track for more than 30 years and was used at both the 2008 and 2012 Summer Olympics.