Juventus were below par in a tense derby against Torino before Simone Zaza's error allowed Cristiano Ronaldo to seal the three points.
Cristiano Ronaldo's penalty gave Juventus a seventh consecutive Serie A victory as Torino's Simone Zaza endured a nightmare moment in a 1-0 defeat to his former club in the Derby della Mole.
Torino held their own for 70 minutes in a cagey affair until Zaza dribbled haphazardly back towards his own box with Leonardo Bonucci in pursuit.
The forward then sold Salvador Ichazo short with a terrible backpass and the substitute goalkeeper brought down Mario Mandzukic.