Cristiano Ronaldo saved Juventus' unbeaten series A record this season when he hit the bench to score the equalizer in a dramatic 2-2 draw at Atalanta.
Juve, who dropped their first away points of the season, were Ronaldo nodded home from close range in the 78th minute.
The Bianconeri thought they had snatched a win when Leonardo Bonucci got home from a free kick in
Juventus, with 16 wins and two draws from 18 games, have 50 points, nine weeks ahead of Napoli.
Atalanta are eighth with 25 points.
Atalanta defender Djimsiti miscued and sent to innocuous Alex Sandro crosses his own net Juventus turned the game around in the second minute before two goals from Duvan Zapata  The Colombian, scorer of Atalanta's last eight goals, collected Alejandro Gomez's pass with his back to goal and then simply past Wojciech Szczesny in the 24th minute.
Juventus midfielder Rodrigo Bentancur was sent off for a second bookable offense in 53rd minute and Zapata headed Atalanta in front of a corner three minutes later.
Ronaldo, left out of the line-up for a Serie A game for the first time since his move from Real Madrid, came
Mario Mandzukic headed into the middle and Ronaldo nodded home.