The Italian cup winners have been heavily linked with the Red Devils’ big money Belgian flop in recent days, but a £4m loan fee is seen as too steep.
Unless the figure is significantly reduced the Naples side will opt out, and they are already looking at alternatives.
Lucas is seen as a potential option, with the Brazilian’s future at Liverpool in doubt.
Napoli boss Rafa Benitez snapped up the midfielder during his time in charge at Anfield and has always been a big fan of his abilities.
With Emre Can in and Steven Gerrard the Reds’ deep-lying central man nowadays, Lucas’ position looks to be on the bench, which may tempt him away.
The Serie side have been linked with the 27-year-old in the past, but they could face competition from Inter Milan.