The match between Juventus and their B team has been staged every year since 1955 at the Agnelli family's estate.
Such was the dominance of the Agnellis over the town that deceased former club chairman Gianni Agnelli was mayor between 1945 and 1980.
Ronaldo's arrival had sparked rumours that the match would be moved to the Allianz Stadium, but the club made a decision to stick with the traditional bucolic setting.
Fans tried to get whatever autographs and photos they could - even stripping returning centre-back Leonardo Bonucci down to his underwear - before Ronaldo emerged from the changing room surrounded by security guards and fans surged towards the barrier separating them from the players.
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The 33-year-old was brought off at half-time, but not before one over-affectionate fan ran on to the pitch and locked him in a hug which required the help of two stewards to get out of.
"It is impossible to follow Cristiano Ronaldo in training".
The Portuguese beat an off-side trap as he was came face to face with the goalkeeper, he then took his time to apply the finish in style.
"In the Champions League against Juve, a quarter-final, you score a goal and see everyone in the stadium applaud you".
The Agnelli family have run Juventus for almost 100 years and chairman Andrea Agnelli was instrumental in securing the funds required to pluck Ronaldo from Real Madrid. July visits to the club museum shot up 15 percent compared to past year, and were almost a third more than in 2016, and the over 29,000 season tickets available to fans have been sold despite a deeply unpopular 30 percent price bump announced before Ronaldo's arrival.