AC Milan continued their 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.
"We're more concentrated and have more self-belief than in the past, we played with a real commitment to attacking and defending as a unit," Pioli told Sky Sport Italia.
"I'm happy with our performance but I know we can still get better."
Milan are one of four teams locked on seven points, with Roma, Lazio and Torino – 2-1 winners over promoted Cremonese.
Leao gave the hosts the lead in front of over 60,000 fans with his first goal of the season, the Portugal winger fortunate to see his duffed shot squirm past Lukasz Skorupski in the 21st minute after good play by debutant Charles De Ketelaere.
The 23-year-old Leao, who has been linked with Chelsea, should have added to Milan's lead before the break, missing a one-on-one with Skorupski in first half stoppage time.
However, he 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.
Nicola Sansone smashed the upright 10 minutes later for Bologna who are hovering above the drop zone with a single point.
Andrea Pinamonti scored his first goal for Sassuolo after moving from Inter, rolling home following a defensive mix-up to give his new team a 2-2 draw at Spezia.
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