The Agnelli family, who own the Serie A champions, own an estate in Villar Perosa and have invited the teams to play a friendly every year since 1955.
Come the half-time whistle, Ronaldo shot off the pitch - followed by one ambitious fan who had to be held off by security after dashing towards and trying to hug his new hero - and towards delirous fans waiting near the dressing rooms, for whom he patiently signed autographs and posed for selfies.
Ronaldo's arrival had sparked rumours that the match would be moved to the Allianz Stadium such was the enthusiasm from fans after his signing, but the club made a decision to stick with the traditional bucolic setting.
A pitch invasion from the almost 5,000 fans in attendance forced the end of the game after only 72 minutes.
Admittedly, no one bothered to defend.
Ronaldo admitted to a hospital in Ibiza for pneumonia
No-one at the private hospital Ronaldo is now said to be a patient at could be contacted early on Sunday for comment. It can be life-threatening, especially among the elderly and those with underlying health conditions.
However Juve's closest recent challengers - Napoli and Roma - have sold important players this summer, and Napoli have to adapt to new coach Carlo Ancelotti following talismanic Maurizio Sarri's departure and subsequent move to Chelsea.
"In the Champions League against Juve, a quarter-final, you score a goal and see everyone in the stadium applaud you".
"It's nice to be here, I'm happy, when I chose to play in Juventus there was not a specific moment", Ronaldo told Juventus TV.
"With the arrival of Ronaldo our expectations are higher for the Champions League".
Ronaldo didn't take part in the club's tour of the United States following his appearance at the World Cup, but took part in training last week with other squad members in Turin.