Many of Istanbul's sports facilities were built or upgraded during the 2000s in an effort to bolster the city's bids for the Summer Olympic Games. Atatürk Olympic Stadium, the largest multi-purpose stadium in Turkey, was completed in 2002 as a five-star (now Category 4) UEFA stadium and an IAAF first-class venue for track and field. The stadium hosted the 2005 UEFA Champions League Final and remains the home field of İstanbul Büyükşehir Belediyespor. Şükrü Saracoğlu Stadium, Fenerbahçe's home field, is also a five-star UEFA stadium, completed in 2006; it hosted the 2009 UEFA Cup Final, the only UEFA Cup final to take place outside the European continent and the last before the Cup was replaced by the UEFA Europa League. Türk Telekom Arena also opened in 2011 to replace Ali Sami Yen Stadium as Galatasaray's home turf; the arena, alongside Atatürk Olympic Stadium, served as the centerpiece of Turkey's unsuccessful bid for UEFA Euro 2016.