Suarez, who was hit with a ten-match ban for biting Ivanovic, has showed more contrition for his actions against the Chelsea defender.
"I know I made a mistake in the incident with Ivanovic - it was me, my fault, and he did not do anything to me," Suarez said.
"I was angry because I had given away a penalty for handball. I was the reason for the penalty against my team - I saw red and completely lost it.
"I can't really explain it and I am so sorry - but the reaction was amazing."