Manager David Moyes was in Italy to watch the champions face Cagliari on Sunday, with the Scot understood to be keen to see Marchisio in action.
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"There are no problems with Marchisio. He came from the Juventus academy, he loves this shirt, it's normal he can play few games in some moments of the season," he told Radio Rai.
"Conte built a great team, we want to succeed also on international stage. I hope Conte will become for Juventus what Ferguson was for United or Wenger is for Arsenal".
United have also been linked with a move for former midfielder Pogba, with Manchester City and Paris Saint-Germain also reportedly interested in the France international, but Marotta says the club are not looking to sell.
"Juventus in its history has always bought many and sold few, when talking about champions," he added.
"From our point of view, we do not want to sell Pogba and so far we have closed the door to any possible buyer.
"Our aim is to consolidate the group. We do not want to sell him, but certain assessments must be made later."