AC Milan's poor start to the season continued as they produced a patchy performance in a 1-1 draw at Parma, a result that failed to ease the pressure on coach Massimiliano Allegri.
Champions Juventus are now nine points ahead of Milan as their long unbeaten run continued. They have avoided defeat in their last 45 league matches.
Andrea Pirlo's deflected free-kick gave them the lead after 10 minutes although Roma's players protested that the free-kick should not have been awarded, with TV replays showing there was no contact between Rodrigo Taddei and Claudio Marchisio.
Juventus took advantage and doubled their lead five minutes later when confusion in the Roma box led to Leandro Castan blocking Alessandro Matri's shot with his hand and giving away a penalty which Artur Vidal calmly slotted home.
Antonio Conte's side could have easily added to their total with Marchisio and Mirko Vucinic both hitting the crossbar before the break.
"Matches like this have to teach us something, you learn from this, and the team needs to realise that we've done very little. We hardly won a tackle," Roma coach Zdenek Zeman, who is starting to come under fire, told reporters.
"I don't understand why we run so little and created hardly anything. It has to be a mental problem."
Stephan El Shaarawy gave Milan the lead five minutes into the second half with his fourth goal of the season, skipping past Cristian Zaccardo in the area and firing through Antonio Mirante's legs.
Roberto Donadoni's Parma responded well to going behind and were invigorated by the introduction of Jonathan Biabany.
