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Primeira Liga is the top professional football league in Portugal. It is also known as Liga NOS for sponsorship reasons. The league was founded in 1934 and is contested by 18 teams. Porto have won the league a record 28 times, the most recent being in the 2017-18 season. Defour played for Porto from 2011 to 2014, winning the Primeira Liga twice during his time at the club.