in 2003 and are the 2015–16 season champions of the A-League. The club was also premier in the inaugural 2005–06 A-League season, finishing 7 points clear of the rest of the competition, before finishing 3rd in the finals. Adelaide United was also a Grand Finalist in the 2006–07 and 2008–09 seasons. Adelaide is the only A-League club to have progressed past the group stages of the Asian Champions League on more than one occasion. Adelaide City remains South Australia's most successful club, having won three National Soccer League titles and three NSL Cups. City was the first side from South Australia to ever win a continental title when it claimed the 1987 Oceania Club Championship and it has also won a record 17 South Australian championships and 17 Federation Cups. West Adelaide became the first South Australian club to be crowned Australian champion when it won the 1978 National Soccer League title. Like City, it now competes in the National Premier Leagues South Australia and the two clubs contest the Adelaide derby. Basketball Basketball also has a big following in South Australia, with the Adelaide 36ers playing in the Adelaide Entertainment Centre. The 36ers have won four championships in the last 20 years in the National Basketball League. The Adelaide Entertainment Centre, located in Hindmarsh, is the home of basketball in the state. Mount Gambier also has a national basketball team – the Mount Gambier Pioneers. The Pioneers play at the Icehouse (Mount Gambier Basketball Stadium), which seats over 1,000 people and is also home to the Mount Gambier Basketball Association. The Pioneers won the South Conference in 2003 and the Final in 2003; this team was rated second in the top five teams to have ever played in the league. In 2012, the club entered its 25th season, with a roster of 10 senior players (two imports) and three development squad players. Motorsport Australia's premier motorsport series, the Supercars Championship, has visited South Australia each year since 1999. South Australia's Supercars event, the Adelaide 500, is staged on the Adelaide Street Circuit, a temporary track laid out through the streets and parklands to the east of the Adelaide city centre. Attendance for the 2010 event totalled 277,800. An earlier version of the Adelaide Street Circuit played host to the Australian Grand Prix, a round of the FIA Formula One World Championship, each year from 1985 to 1995. Mallala Motor