The Italian forward joined the Turin giants on a six-month loan deal from Roma in January and scored two goals in 13 league appearances for the Bianconeri this season.
Juve have until next month to exercise an option to buy the 29-year-old's full rights for 8million euros.
"We brought Borriello in January because we needed to reinforce the team in that department," Juventus general director Giuseppe Marotta said to Gazzetta dello Sport."Now we have an option to buy him and we are evaluating it.
"We will see what happens."