22-year-old centre-back Kristoffer Ajer of Celtic is a main objective for the Rossoneri, especially if Mateo Musacchio leaves. At the moment, Milan have not offered Musacchio a new deal and his contract expires next year.
Norway international Vassback has been a stalwart of the Celtic side in recent years and Milan admire the 6’6″ defender.
Milan’s chief scout Geoffrey Moncada has watched 24-year-old Dumfries all season and his reports have been positive.
With the Dutch season finishing early, Dumfries’ price-tag could drop if Milan decide to make an offer.
Meanwhile, Milan are close to appointing former RB Leipzig boss Ralf Rangnick as their new head coach.