The Argentina global is now on loan at AC Milan, having been been deemed surplus to requirements by La Vecchia Signora after they signed five-time Ballon d'Or victor Cristiano Ronaldo from Real Madrid.
Ronaldo - signed by the Italian giants previous year from Real Madrid as they target a first Champions League title since 1996 - headed in a 61st-minute victor.
Human rights and other issues have overshadowed the buildup, with Amnesty International urging both teams to shun the match over the murder of journalist Jamal Khashoggi in the Saudi consulate in Istanbul.
But the match went ahead at a sold-out King Abdullah Sports City Stadium in Jeddah in front of more than 61,000 fans, including many women who were only allowed into Saudi sports stadiums a year ago for the first time to watch soccer matches.
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Ronaldo stated that he is happy that he has the first title for Juventus.
Ronaldo is top of the Serie A scorers chart with 14 goals since arriving last summer from Real Madrid on a 110-million-euro ($126 million) deal.
Gonzalo Higuain, reportedly the subject of interest from Chelsea, was introduced as a substitute by Milan boss Gennaro Gattuso in Italy's version of the Community Shield. I want to be honest, I didn't even want to talk about Higuain, as we're here for the Supercoppa. He has changed in the last seven or eight years, now he is the ideal machine.
Milan's work to get back in the game was made harder when Ivorian midfielder Franck Kessie was sent off ten minutes after Ronaldo's header, and ultimately the Rossoneri couldn't find a way back in.
There were furious protests from Milan late on when their appeals for a penalty were ignored after Can challenged Andrea Conti inside the box.