Juventus star Cristiano Ronaldo has developed into the "perfect machine", according to AC Milan coach Gennaro Gattuso.
Gattuso's men meet Ronaldo and Juve in the Supercoppa Italiana in Saudi Arabia on Wednesday.
Ronaldo, 33, has settled in well in Italy, scoring 15 goals in 25 games since joining the club from Real Madrid in July.
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Gattuso said the Portuguese star had changed in recent years after initially being too focused on "doing a lot of show".
"I think Cristiano has become an incredible player over the last seven or eight years," he told a news conference.