Barcelona's board are all but resigned to losing Neymar in the biggest transfer in football history after club president Josep Bartomeu appeared to fail in a belated attempt to change the player's mind.

Sources who witnessed the head-to-head at the club's summer training base in New Jersey on Friday say it did not go well for Bartomeu, who departed looking less than happy with what he had been told by Neymar.

Spain's Diario AS said the meeting lasted 15 minutes and when the president left he barely acknowledged those waiting for news of how the summit had gone.

The club's president now accepts that only a stunning change of heart from Neymar can prevent his departure and Barcelona's priority is to try to take control of a situation that has caught them by surprise this summer.

The club have grown used to Neymar's complaints about not being comfortable at the club almost since he arrived in 2013 but most gripes have been seen as a push for a pay increase.