Juventus scored twice inside the final 13 minutes to secure a scarcely deserved 2-1 win over Torino in the Derby della Mole on Sunday (AEDT).
Andrea Pirlo's men cruised past Dynamo Kiev 3-0 in the UEFA Champions League in midweek, but they were badly off the pace against a Torino side who had only won once in Serie A prior to their visit to the Allianz Stadium.
The visitors took a ninth-minute lead through Nicolas Nkoulou's first goal of the season and comfortably held Juve at bay for much of the match.
Champions Juve maintained their unbeaten start to the Serie A campaign, though, thanks to headed goals in the 77th and 89th minute from Weston McKennie and Leonardo Bonucci respectively.
Juve started dismally and found themselves a goal down after nine minutes, Nkoulou half-volleying home from six yards after Cristian Ansaldi's corner had fallen kindly for him.
Wojciech Szczesny denied a clean through Simone Zaza soon after, while Lyanco flashed wide from distance shortly after the half-hour mark.
Matthijs de Ligt headed over from a free-kick at the other end as Juve ended a dire first half with just a solitary shot on target, Paulo Dybala tamely curling into Salvatore Sirigu's hands from outside the penalty area.
The hosts started the second half brightly and thought they had drawn level after 57 minutes, but Juan Cuadrado's deflected long-range effort was ruled out for offside against Bonucci.
Sirigu denied Federico Chiesa as the game entered the final 15 minutes, but he could do nothing about McKennie's first Juve goal moments later, the American rising highest to head home Cuadrado's cross from close range.
Cuadrado was the provider for Juve's dramatic late winner, too, the Colombian's ball in from the right powered past Sirigu by Bonucci to spark wild celebrations from the hosts, resulting in a red card for substitute Carlo Pinsoglio.