"In the first three games it's important to bring points home".
An own goal from Mattia Bani put Juve level again at 2-2.
Ronaldo, who signed for Juve from Real Madrid in July, took seven shots but was unable to open his account for the Italian champions as the league season got underway.More news: Toni Kroos Denies Mesut Ozil's Racism Claims, Says Reasons for Retirement 'Nonsense'
"Ronaldo is playing tomorrow", Allegri told a news conference in Turin before the match.
His team were 2-1 down with 15 minutes to go until levelling courtesy of Mattia Bani's own goal, and the Bianconeri ultimately claimed all three points through Federico Bernardeschi's stoppage-time victor.
Ronaldo and Douglas Costa linked up well, notably in the 18th minute when Ronaldo's effort went just the wrong side of the left post.
The 33-year-old will be eager to replicate a fraction of that glory as he enters the twilight of his career after joining Massimiliano Allegri's side.
4 - Only half of Ronaldo's shots were on target, though, with Sorrentino making a fine block with his knees to keep out a viciously dipping long-range drive.More news: What Google changed in its location-tracking explanation
"He pulled a lot, he moved between the lines, but he was not being served on several occasions".
"We still need to prove that Juventus are technically better now".
A minute's silence will be held before each match with the players taking to the pitch wearing black armbands.
Juventus have one of the best squads in club football around Europe and Ronaldo's addition has lifted that, whereas their lesser-known opponents tonight, Chievo are nothing more than underdogs heading into the match, but as we have several examples that in football anything is possible, no team can be ruled out.
Sampdoria had been due to host Fiorentina and Genoa to travel to AC Milan.More news: United Kingdom parliament attack suspect charged with attempted murder
Napoli, last year's runners-up, gave new coach Carlo Ancelotti a winning start on his return to Serie A after a nine-year absence when they came from behind to win 2-1 at Lazio in the other match yesterday, the opening day of the new season.