Porto clinched a fourth successive league title on 10 May when they defeated Nacional Madere 1-0. It was Porto's 24th championship triumph and was watched by 50,000 fans.
The sole goal of the game was scored by defender and Portugal skipper Bruno Alves in the 48th minute from a corner by Raul Meireles. Porto have 66 points, six ahead of Sporting Lisbon with two games left, but have a better head-to-head record.
Sunday's win was Porto's 21st consecutive match without a defeat this season. They can still wrap up a domestic double on 31 May when they meet Pacos de Ferreira in the Portuguese Cup final.