Nicolo Zaniolo made his first team debut for Roma at Real Madrid, having been signed as a makeweight in the Radja Nainggolan sale to Inter Milan.
Juventus winger Douglas Costa has been given a four-match ban by Serie A after spitting at an opponent during his side's 2-1 win over Sassuolo.
Federico Di Francesco has rejected suggestions Douglas Costa spat at him because the Sassuolo forward racially abuse him.
Juventus president Andrea Agnelli has said signing Cristiano Ronaldo was just the latest step in his club's bid to become the best in the world.
Mexico international Guillermo Ochoa insists his botched move to Napoli fell through over problems elsewhere, rather than his own qualities.
It was a disappointing day for AC Milan as they drew with Cagliari, but Gonzalo Higuain netted his first goal for the club to spare them blushes.
There weren't many positives from Milan's 1-0 win over Luxembourgish side F91 Dudelange but Gonzalo Higuain making it two goals in two was one.
Argentina forward Gonzalo Higuain scored his first goal for AC Milan to earn them a 1-1 draw at Cagliari.
It was not perfect and their two-goal hero still seeks his best form, but Juve won again. Douglas Costa, though, had a day to forget.
Cristiano Ronaldo said he had been thinking quite a bit about scoring his first goal for Juventus and was glad to finally do so on Sunday.
Juventus coach Massimiliano Allegri said winger Douglas Costa faces a fine after he was sent off for spitting at Sassuolo's Federico Di Francesco.