The Italian champions are currently second in Group B and need a draw against Galatasaray in Istanbul in their final match to go through to the last 16 as runners-up.
"We aren't qualified yet," he told Sport Mediaset. "We did what we had to tonight, but there is nothing official now.
"We have to go to Turkey and it will be a very difficult game, so we must play well in order to qualify.
"The Turkish fans are very passionate in sport of their team and it is never easy to play in Istanbul."
Galatasaray are currently two points behind Juventus in third place in the group.