Udinese great Antonio di Natale has hailed the impact of Zlatan Ibrahimovic at AC Milan.

Di Natale admits he's unsurprised by the Swede's form.

"He is a great champion and is very important for AC Milan," he said.

"He is demonstrating that age doesn't matter, as it's all about how you are physically and mentally.

"When I was 38 years of age I felt like 28. The mental aspect makes a difference."