AC Milan vice-president Adriano Galliani expects the negotiations in selling defender Thiago Silva to Paris Saint-Germain to be arduous.
Galliani was in Paris yesterday to hold talks with PSG executives with a view to the Brazil international joining the French club.
Milan were adamant they would not sell Silva but are now tempted with reports PSG have reportedly increased their offer to 50million euros.
"It will be a long negotiation process with PSG," Galliani said to Gazzetta dello Sport.
The fact that Milan are considering Silva's possible departure has been met with criticism by the Rossoneri faithful.
"Silva is a player that you cannot substitute, regardless of the amount of money offered," AC Milan striker Antonio Cassano said.
"Thiago makes up 50% of the squad."
Former AC Milan captain Paolo Maldini would be surprised if the Rossoneri let Silva leave the San Siro this summer.
"Thiago's transfer is a sign of weakness," Maldini said. "He is the great defender there is in the world right now and Milan cannot do without him."
The 27-year-old Silva, who is also a reported target of Manchester City, Chelsea and Barcelona, is under contract with Milan until June 2016.
