Zaidu Sanusi scored in added time on Saturday as Porto clinched their 30th Portuguese league title with a 1-0 victory away to Benfica.
The result also guarantees that last year's champions Sporting will finish second, and qualify for the Champions League group stage, with Benfica third.
Nigerian left-back Zaidu struck on a counter-attack minutes into stoppage time to put Porto nine points ahead with one round of games to play.
IrrepetÃvel é palavra que não existe no nosso dicionário ?? Somos Campeões ??#FCPorto #CAMP30ES pic.twitter.com/PViZdi0izc
— FC Porto (@FCPorto) May 7, 2022
Sporting travel to Portimonense later Saturday and have an eight-point edge and a game in hand on Lisbon rivals Benfica.
Benfica, who reached the quarterfinals of the Champions League this season, will go into the qualifying round of the competition.
Tanto Porto??#FCPorto #CAMP30ES pic.twitter.com/jsl2u3hK7e
— FC Porto (@FCPorto) May 7, 2022
Before their first league defeat this season, at Braga two weeks ago, Porto, under coach Sergio Conceicao, set a new Portuguese league unbeaten record of 58 games.
Porto will be able to crown their season with a double, when they face Tondela, 16th in the league, in the Portuguese Cup final on 22 May.