A roundup of all of Sunday's action in Italy's top flight…
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Juventus 1-0 AC Milan
Paulo Dybala scored the 77th-minute winner to keep Juventus unbeaten (16 games - all competitions) on the season, but that's hardly the top storyline coming out of the Bianconeri's 1-0 victory over AC Milan.
Instead, a potential rift between Cristiano Ronaldo and manager Maurizio Sarri has taken center stage after the Portuguese forward appeared thoroughly perturbed to have been subbed off in the 55th minute. It was the second straight game Ronaldo was brought off, and he appeared to give Sarri a dirty look and mutter something under his breath before heading straight down the tunnel.
It was Dybala, the game's only goal-scorer, who replaced him. It was a beautifully worked goal for Dybala, who combined with Gonzalo Higuain before twisting past a defender and firing a right-footed shot past Gianluigi Donnarumma.
The victory keeps Juve (32 points) top of the Serie A table, a point clear of Inter Milan, after a dozen games played. The journey for a ninth straight scudetto will continue with a trip to last season's fourth-place finishers Atalanta following the upcoming international break.
Parma 2-0 Roma
Earlier on Sunday, Roma suffered another disappointing result - a 2-0 loss to Parma - to fall two points out of fourth place.
Mattia Sprocati broke a scoreless deadlock in the 68th minute, followed by a late insurance goal scored by Andreas Cornelius in the 92nd.
Parma now sit eighth in the table, just two seasons after being promoted back to Serie A and only five seasons after being forced down to Serie D.
Elsewhere in Serie A
Cagliari 5-2 Fiorentina
Lazio 4-2 Lecce
Udinese 0-0 SPAL
Sampdoria 0-0 Atalanta