Inter and Napoli are doing a great deal of business at the moment, which could include a swap between Matias Vecino and Allan.
According to Sky Sport Italia, the two clubs began talks about a potential exchange of midfielders for the January transfer window.
Vecino is reported to be on his way out of San Siro if Christian Eriksen completes his transfer from Tottenham Hotspur.
He had been linked with Manchester United, but now Napoli are interested in what could be a switch with Allan going the other way.
The situation around Allan has become tense yet again after he tried to push for a move to Paris Saint-Germain a year ago.
He stormed off down the tunnel after a substitution in the 2-0 home defeat to Fiorentina and was not included in the Coppa Italia squad that beat Lazio.
Gennaro Gattuso moved the system to 4-3-3 and brought in both Diego Demme and Stanislav Lobotka during the January transfer window, so Allan might no longer be required.
Inter face competition for Allan from Carlo Ancelotti’s Everton.
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