Tuttosport says the Italian club have an agreement in place with Sanchez but have struggled to agree a fee with the Spanish club.
Juve were only willing to offer between £12-14m but the Catalans were hoping to receive £20m for the Chile star.
However it seems that a £16m fee could move the deal along.
United were also in the frame, but Sanchez has no interest in signing for Louis van Gaal's new side which will come as a huge blow to Old Trafford officials.
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