Ronaldo will restart his Manchester United journey which he paused 12 years ago when the Red Devils face Newcastle at Old Trafford on Saturday.
Cristiano Ronaldo wore the number seven shirt in his first stint with the club. Cavani switches to the number 21 shirt.
Cristiano Ronaldo claimed a scoring world record on Wednesday when his late brace, after missing an early penalty kick, gave him a tally of 111 international goals.
Juventus FC have reached an agreement with Manchester United FC for the transfer of Cristiano Ronaldo for an initial €15 million (£12.86 million), the Serie A club announced.
“Manchester United is a club that has always had a special place in my heart, and I have been overwhelmed by all the messages I have received.”
Newly signed Cristiano Ronaldo was not in the matchday squad but other newly singed players, Rafael Varane and Jadon Sancho played.
The development was announced by Manchester United on Friday.
The UK newspaper said Ronaldo left the Juventus training ground early Friday morning after saying goodbyes to teammates.
Ronaldo joins Manchester City on a two-year deal from Juventus.
Ronaldo, 36, has one year left on his current contract with Juventus.
