Neymar has been fined by Santos and ordered to work with a psychologist after a series of worrying episodes.
The Blues target has been accused of petulant and reckless behaviour, culminating in a foul-mouthed outburst against his manager on Wednesday night.
Santos boss Dorival Junior was visibly shaken after the game and said: "In seven years as a coach, I've never had such a problem with indiscipline.
"It is a difficult problem, grave, serious and will require effort from us all. At all times we feel that an act of indiscipline, whether from Neymar or a boy from academy, we will punish it.
"I love him, but there was a new event. We will have to act the same way (as always)."