AC Milan maintain unbeaten start to their Serie A title defence with a 2-0 win over Bologna on Saturday as Tammy Abraham earned Roma a 1-1 draw at Juventus on Paulo Dybala's return to his old stomping ground.
Champions Milan eased to a routine win at the San Siro with goals either side of half-time from Rafael Leao and Olivier Giroud to go top on goal difference.
Stefano Pioli's side took full advantage of Inter Milan's loss at Lazio on Friday night to move a point above their local rivals.
Milan are one of four teams locked on seven points, with Roma, Lazio and Torino -- 2-1 winners over promoted Cremonese.
Napoli will reclaim the summit should they win at Fiorentina on Sunday night, Luciano Spalletti's flamboyant side on a perfect six points after two stunning displays in their opening fixtures.
Leao gave the hosts the lead in front of over 60,000 fans with his first goal of the season, and then set up Giroud's opening strike of the campaign in the 58th minute with a perfectly clipped pass which the France international guided home with a beautifully-placed volleyed finish.
Mourinho blasts Roma
Jose Mourinho said he was "ashamed" of his Roma players' performances before they fought back to draw through Abraham's first goal of the season.
England international Abraham headed home from Dybala's knock-down in the 69th minute at the Allianz Stadium to maintain Roma's unbeaten record.
Mourinho used the vulgar Italian expression "culo" to describe their good fortune at being only a goal down at the break after being given a lesson by Juve.
Roma escaped Turin with a point despite being second best for long periods. Dusan Vlahovic put Juve ahead with a stunning free-kick after barely a minute.
"I told my players at half-time that I was ashamed of them... We can't come here and play like this," he said.
"We did absolutely nothing, it was pure luck. It was a very different team in the second half."