Roma's loss at Catania on Sunday guaranteed Juve a third-successive Scudetto before Monday's victory over Atalanta.
Antonio Conte's men now sit on 96 points with two games remaining and Giovinco says the squad are now focused on becoming the first Serie A side to reach three figures for the campaign.
"Celebrating with a victory makes it even sweeter," he told the club's official website after the win.
"We're now going for our other objective, a 100-point finish.
"We always believed we could win the Scudetto, even though Roma had a fine season.
"It's a title victory we've fully deserved."