Messi and Neymar struck up a close bond during their time at Barcelona together, both on and off the pitch.
However, Spanish website Diario Gol claims the Argentina international did have concerns about his fellow South American.
It is reported that Messi thought the Brazil international was leaking private and confidential information to Real Madrid.
That is because of his close relationship with Real star Marcelo, with Lionel Messi fearing his close friend was being influenced by his compatriot.
However, Messi supposedly stopped thinking that the moment Neymar joined PSG in a £200million transfer deal.
And Diario Gol say he now fears Andre Gomes is the one giving information to Los Blancos.
This was categorically denied by Gomes in October, with the Portugal international saying: “I haven’t said anything against Messi or Valverde. It’s made up.
“I have great respect for Valverde and Leo.”
But Messi is reportedly still suspicious of his Barcelona team-mate.
As a result, he wants the midfielder sold when the transfer window reopens in January.
Gomes is one of a host of Barcelona players facing an uncertain future at the club.
With the Catalan giants lining up a huge move for Liverpool’s Philippe Coutinho, they need to balance the books.
Rafinha, Aleix Vidal and Arda Turan are among the players who could be shown the exit door.