Paris Saint-Germain are open to selling Neymar this summer, sources have told ESPN FC, although the Ligue 1 champions have yet to receive any formal offers for the Brazilian.

A potential move would come two years after Neymar joined the capital club from Barcelona for a record transfer fee of €222 million.

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A source said that PSG expect an offer from either Barcelona, Real Madrid or Manchester United. Noted football agent Pini Zahavi is involved in the process.

Sources close to Barcelona told ESPN FC on Monday that the Catalan giants think a deal "could be doable, but it won't be simple."

One reason Barca are now contemplating bringing Neymar back is because key players desire to have him back in the dressing room, according to a source. The Brazil international remains good friends with Barcelona stars Lionel Messi and Luis Suarez, in particular.

PSG owner Nasser Al-Khelaifi has hinted that Neymar could be allowed to leave in the current transfer window. He told France Football this week that the club will no longer tolerate superstar attitudes from their biggest players and warned Neymar he only wants players who are "willing to give everything for the shirt."

Neymar is sitting out the Copa America in Brazil after suffering a right ankle injury in a friendly match against Qatar earlier this month. He is also under investigation after a woman accused him of raping her at a Paris hotel. He has denied wrongdoing.

ESPN FC's Moises Llorens and Sam Marsden contributed to this report.