Sportmediaset says Marchisio is considering his future at Juve and pondering a move abroad.
The Italy international has been a long-term target for Ferguson, who admires his ability and also his tactical awareness.
Juve are eager to make a big splash in the summer market, but will be forced to fund their plans by selling one of their major names, with Marchisio being nominated as the most likely to be sacrificed.
Should he become available, Ferguson is sure to be banging the door down at Juve to discuss a price for the midfield ace.
Can Man Utd prise Marchisio away from Juve? Should he move on? Give us your shout below...