Isak, 25, remains adamant that he will never play for Newcastle again has he pushes for a move to Premier League champions Liverpool.
Newcastle will host Arne Slot’s side on Monday (August 25) with the Sweden international not expected to be allowed to leave this summer.
According to Corriere dello Sport, Eddie Howe’s side are still looking to sign a new striker the summer and have turned their attention to Vlahovic, 25.
The Serbia international has been told to find a new club by Juventus, although no move is expected to happen until late in the summer window.