The two managers clashed in the second-half, with Conceicao later declaring he was responding to comments made by the City manager.
He declared, "In addition to the way he communicated with the players on my team, how he communicated with the referee ... Now I understand when you mentioned in the preview of the weight that the FC Porto bench had in relation to this. This was a fantastic example of that.
"In addition to the game, he spoke of our country with less beautiful words. Those who do not feel that they are not the son of good people, I had to respond. Guardiola had an unpleasant stance.
"I had more to complain about being on the FC Porto bench, because we were very badly treated."