Cristiano Ronaldo finally scored his first goal since moving from Real Madrid to Italy when he twice bagged in Juventus' Serie A win against Sassuolo in the Old Lady's 2-1 win on Sunday afternoon, however the five time Ballon d'Or victor wasn't the main talking point.
On a Juventus corner, Gianmarco Ferrari attempted to head the ball down for his goalkeeper to collect but the ball came off the post and fell to Ronaldo who scored from a yard or two out.
The 33-year-old went three games without scoring for the Turin-based side before the game but he was on hand to score an easy tap-in five minutes into the second half, before scoring a second.
Ronaldo skipped Portugal's Nations League win over Italy to focus on his new club after failing to score in their opening three Serie A games.
Costa had seemingly elbowed Sassuolo's Federico Di Francesco in the buildup of one of Juventus's goals and, as the pair continued to argue, the Juventus midfielder appeared to headbutt his opponent.
'It was a bad mistake, I am aware of it and I apologise to everyone for this.
"This is football. The important thing is that the team wins. I'd like to emphasise that this isolated incident does not correspond with what I have always shown throughout my career".
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Juventus next face Valencia in the Champions League on Wednesday as they look to make a strong challenge in Europe this season, part of the reason Ronaldo was signed in the first place.
Sassuolo are third with seven points.
Ronaldo collected the ricocheted ball and put it in the wide open goal, then doubled his tally 15 minutes later on a left-footed shot that got past goalkeeper Andrea Consigli.
"I'm very happy, Sassuolo did a good game, but we created a lot, I really wanted to score, so I'm happy", he said.
Stephan El Shaarawy and Bryan Cristante put Roma, who lost to AC Milan before the worldwide break, firmly in command at half-time.
"Sassuolo fought hard and as they became exhausted later on, we took full control of the game". "This can't happen against Real", said Roma coach Eusebio Di Francesco.