Neymar felt he could not leave the field without responding to Alvaro after claiming the officials ignored his accusations of racism against the Marseille defender. (More Football News)
Paris Saint-Germain superstar Neymar was one of five players sent off in scenes that marred the end of Sunday's Classique at the Parc des Princes, which Marseille won 1-0.
The Brazil forward saw red for striking Alvaro on the back of the head and their confrontation later continued on social media.
Alvaro denied Neymar's allegations with a Twitter post that drew an angry response from the former Barcelona star.
PSG have backed Neymar and called for an investigation into the claims, while Marseille have since put out a statement insisting Alvaro is not racist.
In a lengthy post on Instagram explaining his actions, Neymar wrote: "Yesterday I revolted. I was punished with red because I wanted to hit someone who offended me.
"I thought I could not leave without doing something because I realised that those in charge would not do anything, did not notice or ignored the fact.
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"In our sport, aggressions, insults, swearing are part of the game, of the dispute. You can't be affectionate, I understand this guy [Alvaro] partly, all is a part of the game. But racism and intolerance are unacceptable.
"I am black, son of black, grandson and great grandson of black also. I am proud and I do not see myself as different from anyone.
"Yesterday I wanted those in charge of the game (referees, assistants) to position themselves impartially and understand that there is no longer such a place for a prejudiced attitude.
"Reflecting and seeing all the manifestation that happened, I am saddened by the feeling of hatred that we can provoke when, in the heat of the moment, we snap."
Neymar continued: "Should I have ignored it? I don't know yet… Today, with a cool head, I say yes, but in due course, my companions and I asked the referees for help, and we were ignored. That's the point!
"I accept my punishment because I should have followed the path of clean football. I hope, on the other hand, that the offender will also be punished.
"Racism exists. It exists. But we have to stop it. No more, enough!
"Yesterday I lost in the game and I lacked wisdom. Being in the centre of this situation or ignoring a racist act will not help, I know. But pacifying this "anti-racism" movement is our obligation so that the less privileged will naturally receive their defence."
