The header of Mario Mandzukic gave Juventus a narrow victory over Inter and extended the lead in Serie A to 11 points, at least until Saturday.
The Croatian striker made his debut to meet Joao Cancelo's cross in the second half, after Inter lost a good chance.
Before the interval, Roberto Gagliardini hit the post with a low shot, while Matteo Politano failed to punish Blaise Matuidi's mistake shortly after half the time.
Napoli can reduce the gap from Juventus champions when they play in Frosinone.
The second place of Carlo Ancelotti faces the 19th place with Canarini at 14:00 GMT on Saturday.
The victory of Juve & # 39; s Derby d'Italia means that they are equal to the best ever of a team after the first 15 games of a season in the five best European Championships of England, Italy, Spain, France and Germany.
They have equaled the return of France St-Germain of the French champions this season, with 43 points.
Inter remains third in the standings, now 14 points behind Juventus, after a game that could have won.
Juventus have won the last seven Serie A titles, are unbeaten in the league this season and have not lost at home in the league since April, but have been exposed twice and left unpunished by Luciano Spalletti's team.
After the good hold-up game by Mauro Icardi, Gagliardini could not establish a good connection when he beat Wojciech Szczesny, the ball hit the base of the post and rebounded against the Juventus goalkeeper.
Politano appeared panicked when he was offered a chance to score from inside the box after Matuidi gave the ball away.
And in recovery time, the substitute Lautaro Martinez punctuated extensively with the last chance of Inter, snatching an opportunity that came from the low clearance of Cancelo.