Felicevich has already struck terms with United vice-chairman Ed Woodward over a five-year contract worth €40 million - plus bonuses.
Now United are pushing Juve to reopen talks about a fee for the Chile international.
Juve GM Beppe Marotta is reluctant to do so with the transfer deadline to fall on Monday. However, their pursuit of United striker Javier Hernandez still gives Woodward a card to play in negotiations.
United are wiling to pay €42 million cash for the 27 year-old Vidal.
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