Juninho told talkSPORT: "Neymar has been brilliant in Brazil for the last two years.
"He hasn't played very well, though, when he has gone overseas.
"He has to change his game a little bit when he plays away from Brazil. The game is different. In Brazil he gets the ball with a lot of time, but in Europe it won't be like that. He'll have to think first and then get the ball."