Despite his 35 years Ronaldo shrugged off the quick succession of matches played in hot summer weather after the lockdown, bringing his tally to 31 this season.

The Portuguese striker has scored 10 goals since football returned in Italy on June 20, more than any other player in Europe.

He also matched former Italy World Cup winner Felice Borel, who was the last player to score 31 goals for Juventus in the 1933-34 season.

But he remains three goals behind Serie A's leading scorer Ciro Immobile, who scored a hat-trick earlier in Lazio's 5-1 win over Hellas Verona.

"Delighted for the second consecutive championship and to continue building the history of this great and splendid club," said Ronaldo on Instagram.

"This title is dedicated to all Juventus fans, in particular to those who have suffered and are suffering from the pandemic that has taken us all by surprise by overturning the world.

"It was not easy! Your courage, your attitude and your determination were the strength we needed to face this tight final of the championship and fight to the end for this title that belongs to all of Italy.

"A big hug to you all!"

The breakthrough came in the final move of the first half, when Pjanic cleverly rolled a pass across the penalty area to allow Ronaldo to lash home his 31st league goal of the season.

Juventus made sure of the title in second half when Bernardeschi pounced on the rebound of a Ronaldo shot and tapped in a decisive finish.

Sampdoria had no way back into the game and had to play the final 20 minutes a man down when Morten Thorsby was sent off for a second yellow card.

But the match could prove costly for Juventus before the return leg of their Champions League last 16 tie against Lyon on August 7, when they need to overturn a 1-0 deficit from the first match in France.

Danilo took a knock, while influential forward Paulo Dybala limping off with a muscular problem early in the match will be a worry for Sarri with Lyon's visit to Turin less than two weeks away.