The Italians are understood to be willing to pay closer to Benfica's £35m valuation of their defender than the Reds are.
Manchester United face competition from Roma for central defender Victor Lindelof.
The Old Trafford giants have been rated as favourites to sign the 22-year-old Sweden international from Portuguese champions Benfica.
A price could not be agreed during the January transfer window. Benfica value the player at £35million, while United’s figure is some £10m below that.
Now Roma have entered the scene and declared their interest.
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They are willing to pay £30million for Lindelof, so United will have to re-adjust their valuation if manager Jose Mourinho is to get his man.