Ibra scored a 93rd minute equaliser at San Siro to ensure his side collected a point after going behind three times.
"This is a great team," Ibrahimovic said. "There are great players. It's normal that they win without me [like against Cagliari on Thursday].
"Conceding four goals at home is not normal. Scoring four goals and not winning is not normal.
"But the important thing is that we get off to a good start in the New Year.
"If we hadn't have won, we would have gone down mentally. This success is very important."