Neymar lives a lonely existence at Paris Saint-Germain, says Unai Emery, with the €222 million asset isolating himself and failing to settle fully.
The Brazil international completed a record-breaking switch to Parc des Princes from Barcelona in the summer of 2017.
He had enjoyed a productive debut campaign on the field prior to suffering an unfortunate broken metatarsal in February – with 28 goals recorded in just 30 appearances.
Emery, though, has revealed that a man who spent his entire recovery period after undergoing surgery back in his homeland is not yet adjusted to life in Ligue 1 – amid much talk that he could soon be heading back to La Liga at either Barca or Real Madrid.
The PSG boss, who will be leaving his post at the end of a title-winning season, told SFR Sport: "He goes to his house and shuts himself off.
"He's not there every day, but he's not yet immersed himself 100 per cent in Paris, the French league, the difficulties, the different football.
"It's all a process, and at PSG we have been integrating him into the group, where we want him to feel welcome.
"He has to be patient, we've done 50 per cent of the work with him, the other 50 per cent is missing at the moment."
Emery has also suggested that Neymar’s media and commercial commitments have done little to aid his cause, with the 26-year-old having become the star attraction in France after establishing himself as a member of football’s global elite.
The Spaniard added: "That Neymar, after training, has to do four different publicity activities is not the best, but you have to understand it because he is a massive global star who has an impact.
"He still has to adapt to Paris and to his teammates, not just the Brazilians."
Neymar has recently returned to France, as he closes on a return to full fitness, but PSG’s 2017-18 campaign is about to come to a close.
They have a Coupe de France final clash with Les Herbiers to come on Tuesday, before rounding off their Ligue 1 season with a visit from Rennes and a trip to Caen.
Neymar may get to see some game time in those fixtures, but his focus has already started to shift towards a World Cup campaign with Brazil in Russia this summer.