Juventus secured a comfortable 3-0 win at Udinese on Sunday, while late goals from Pontus Almqvist and Federico Di Francesco gave Lecce a 2-1 comeback win over last season's runners-up Lazio.
Juventus made a blistering start at Stadio Friuli, racing into the lead in the second minute after Dusan Vlahovic intercepted a stray pass and set up Federico Chiesa, who drilled home a low shot from the edge of the penalty area.
Vlahovic made it 2-0 with an ice-cool penalty and Adrien Rabiot added a third with a bullet header before the break. Juve controlled the second half without creating many more chances and were content to see the game out.
Lazio captain Ciro Immobile marked his eighth season at the club by netting the opener in the 26th minute, as he met Luis Alberto's cross with a sliding finish to dink the ball over the onrushing Lecce goalkeeper.
In the second half, Lecce turned the match on its head in the blink of an eye, with Almqvist's half-volley levelling the game in the 85th before Di Francesco fired home the winner in the 87th minute to raucous cheers at the Stadio Via del mare.