Neto shoved the young ball boy in injury-time time, causing him to fall on to a chair and sparking a melee between both sets of players.
Asked about the incident on TNT Sports after the game, Neto said: "I want to apologise to the ball boy. I have already spoken to him.
"We were losing and in the emotion of the game I wanted to get the ball fast and I gave him a little push.
"I'm not like this. It was in the heat of the moment and I want to apologise. I gave him my shirt. I'm really sorry about it - I feel I have to apologise to him.
"My French is not very good, and (Portugal team-mate) Vitinha came over and said to him I was not like this.
"At the end he (the ball boy) laughed and I gave him my shirt and said sorry about 35 times. He could see what had happened and was happy with the situation."
Chelsea boss Liam Rosenior also said: "I saw there was an altercation with the ball boy. But if there was anything from our side that was wrong or out of order, I apologise on behalf of the club.
"But I think Pedro has done so in interviews. I genuinely haven't seen it back."