"I have not changed my idea about the red card," Drogba told the People.
"The United players were provoking me and I was the one who got sent off.
"I reacted the way I did because the decision was a massive injustice. I was psyched up to take my penalty when my turn came and in an instant I was off the pitch. I want to forget it.
"At least we have started well, but there is a long way to go and the tough games are still to come."