Sporting Lisbon defended their Portuguese crown on Saturday with a 2-0 win over Guimaraes to hold off rivals Benfica on the final day of the Primeira Liga season.
Both Sporting and Benfica were level on points going into their last match after a tense 1-1 derby draw last weekend left the title race on a knife edge.
Benfica needed to better Sporting's result to triumph but drew 1-1 at Braga, although even a victory would not have been enough as Rui Borges' side triumphed and had the superior head-to-head.
Pedro Goncalves broke the deadlock in the second half and the division's top goalscorer Viktor Gyokeres notched his 39th league goal of a stunning campaign to seal Sporting's victory.
"(Defending the title) means everything, that's what we wanted, all the support is incredible," Gyokeres told Sport TV.
The 26-year-old forward has been linked to several big European clubs including Arsenal.
"It's football, you never know what can happen, I'm still here, nobody can predict the future, let's see," he said, on his future.
Manchester United coach Ruben Amorim led Sporting to last year's title and after he departed in November was replaced by Joao Pereira, who only lasted six troubled weeks before Borges took over.
Sporting claimed their 21st Primeira division title and could make it a domestic double as they face Benfica next Sunday in the Portuguese cup final.
"We're not just in the final to play – we want to win," added Gyokeres. "But now we want to celebrate the league title."