Ibrahimovic admits he was exhausted by the end of the Auxerre match and hailed teammate Ronaldinho.
"We tried to score throughout this difficult game and Auxerre were aggressive, but at the end we won 2-0," said the Milan hitman.
"I scored a great goal and the team did well, so now we can relax for the final match.
"I was very tired at the end and was making too many mistakes, so I asked to be substituted. Ronaldinho came on and scored, so it all worked out."
Ronaldinho has been benched for the last five games on the trot in all competition, but made an impact in only five minutes on the field.
"The whole team is very happy for Ronaldinho. He isn't playing much, but he works hard in training and we are all behind him."