Milan go into the tie having beaten Toro on the weekend in Serie A.
“It will be an important moment for him," said Pioli. “The main thing is to have overcome the muscular problem.
“He must find more rhythm and minutes; he will find it tomorrow."
He added: “For our mentality and desire, we must try to win every single match.
“We are young, and the club is prestigious.
“Our goal is to advance. We will meet a determined opponent."