AC Milan goalkeeper Marco Sportiello suffers a calf injury. Photo: AFP
In a statement, Milan, who will also be without the suspended Mike Maignan for Sunday's night's fixture, said second-choice goalkeeper Sportiello's left calf would be re-examined in 10 days.
Italian media report that Sportiello, 31, could be out until after the next international break in mid-November.
The duo's absence means that 40-year-old Antonio Mirante will start his first Serie A match since April 2021 when he was a Roma player.
French international 'keeper Maignan is suspended for being sent off in the seventh minute of added time in Milan's 1-0 win at Genoa before the most recent international break.
Maignan's France teammate Theo Hernandez will also miss the Juve match after his fifth booking of the season at Genoa triggered a one-match suspension.
Milan head into Sunday's match at the San Siro two points ahead of their local rivals Inter Milan, and four in front of third-placed Juve.
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