Giampaolo Pazzini scored a late penalty to hand Hellas Verona a shock victory over Juventus.
Cristiano Ronaldo netted in his 10th successive league game - one short of a Serie A record - to open the scoring for the league leaders before Fabio Borini equalised for the hosts.
But Pazzini converted an 86th-minute spot-kick after the video assistant referee said Marash Kumbulla's header hit Leonardo Bonucci's arm.
Victory sees Verona rise to sixth.
Meanwhile, Juve remain top with 54 points but Inter Milan could replace them at the summit of Serie A if they beat AC Milan on Sunday.