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The National Soccer League (NSL) was the top-tier professional men's soccer league in Australia from 1977 to 2004. It was replaced by the A-League, which began in 2005. The NSL was the most successful league in Australia's soccer history, producing many of the country's best players and teams. The league was also a breeding ground for future stars of the game, such as Harry Kewell, Mark Viduka, and Tim Cahill.