Winger Krasic moved to Italian giants Juve on a four-year deal for 15 million euros.
"I'm here to win things, I want to show that I'm an important player for this team," the 25-year-old said.
"I had offers from Manchester City, from Fenerbahce and there was also interest from other teams.
"But from the moment that I knew about the possibility of coming to Italy, I had no doubts."
Liverpool said on Saturday that Aquilani, who could not establish himself at Anfield after joining in the summer of 2009, will join Juventus on a season-long loan.
"The midfielder will undergo a medical in Italy on Monday," the Reds said on their official website.
Juventus have also signed defenders Leonardo Bonucci and Marco Motta, midfielder Davide Lanzafame, Italy winger Simone Pepe, forward Jorge Martinez and goalkeeper Marco Storari in the close season.
They are looking to make up for last season's disappointment after they finished seventh in the Italian Serie A.