The Milan boss gave an update on the forward after joking that he was in trouble for posting a video of himself scoring in training on social media, which raised optimism over his potential return to the fold.
“I scolded Ibra for that video because then you bombarded me with messages to find out if he had recovered,” Pioli told a pre-match press conference.
“He’s better, he’s working well, but he won’t be there tomorrow.”
The Italian head coach added on Portuguese striker Rafael Leao continuing to fill in for Ibrahimovic up front: “Leao is growing a lot but his characteristics are not the same and we have to exploit them in the right way.”
Milan warmed up for their showdown against the reigning Serie A champions by beating Benevento 2-0 at Stadio Ciro Vigorito on Sunday.
That result ensured that Pioli’s side remain top of the standings by a point ahead of arch-rivals Inter, who picked up an emphatic 6-2 home win over Crotone.
The Rossoneri will be protecting their record as the only unbeaten team left in any of Europe’s top five leagues when they take on Juve, who are currently 10 points off the pace in fifth having played a game less.