Neymar has voiced his regret at not taking more action against Marseille's Alvaro Gonzalez following allegations of racism .
Paris Saint-Germain lost 1-0 to Marseille on Sunday but the game was marred by ugly scenes at the end of the match with five players sent off for their involvement in a brawl.
Neymar was the last to be given his marching orders for slapping Gonzalez and he accused the Spanish defender of racism as he left the pitch.