He may have been denied 10 minutes earlier, but Barca's go-to man does it again, placing past the hapless Bounou after a smart lay-off from Arturo Vidal.
Max Allegri will not be pleased by what he's seen so far from the Old Lady, who have misplaced numerous passes under little pressure. The visitors continue to dominate the ball but all they have to show for it in the last five minutes is a free-kick from Ronaldo straight into the wall
Allegri's men have looked pretty toothless so far in attack but are nearly gifted the lead by Cristian Molinaro, who has Marco Sportiello to thank for tapping his header from a Juventus corner over the bar.
The keeper on loan from Atalanta comes to the hosts' rescue again by parrying Ronaldo's drive.
The Old Lady are dominating possession as expected, but their final ball could do with some work, with Juan Cuadrado and Alex Sandro lacking in end product so far.
It's been a pretty tepid start in Lazio by both sides. The host's joy has been restricted to winning a couple of free-kicks down Juve's right.
Ronaldo's involvement so far has seen him rolling around on the floor twice, but he should score a minute later but fails to get hold of Mandzukic's knock-down and Frosinone manage to clear.
So, it's back to league action for Barcelona and Juventus on this autumn Sunday evening.
Will Barca's trident wreak havoc on the Girona defence in the first Catalan derby of the season? Will Cristiano Ronaldo put his red card disappointment in midweek behind him with strikes against lowly Frosinone?
Join us for kick-off in Italy and Spain in just over ten minutes time.
President of the RFEF, Luis Rubiales, revealed on Spanish radio that he will formally move to block the proposal, having called it an 'invasion' of the US, with the backing of governing bodies in charge of European and world football in the form of a letter sent to La Liga chief Javier Tebas.
Good evening and welcome to The Independent's live coverage of Frosinone vs Juventus and Barcelona vs Girona.
Join us from 18:30 BST, where we will bring you the team news and build up from the La Liga and Serie A ties.
When is it?
Frosinone vs Juventus kicks off at 19:30 BST at the Stadio Benito Stirpe.
Barcelona vs Girona begins at 19:45 BST at the Camp Nou.
How can I watch it?
Neither match is available on normal television, but Eleven Sports will be showing live coverage online and on their apps. The monthly streaming service is priced at £5.99 a month, or £59.99 for an annual pass.
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