Neymar accused Marseille defender Alvaro of making racist comments during PSG's 1-0 loss in an ill-tempered match.
The match finished 9 v 8, with Neymar, Leandro Paredes, Laywin Kurzawa, Dario Benedetto, and Jordan Amavi red-carded in stoppage time.
"VAR catching my 'aggression' is easy. Now I want to see the image of the racist calling me a 'monkey motherf---er'... this is what I want to see!" Neymar tweeted after the match.
PSG sporting director Leandro criticzed referee Jerome Brisard for not keeping control of the match.
"A total of 14 cards were brandished and five of them were red, which means the match got out of control.
"[Brisard] lost his head. He officiated the League Cup final but he doesn't have the experience for this kind of fixture."