Ronaldo keeps Juventus perfect in Serie A

Cristiano Ronaldo erased the frustration of his Champions League red card mid-week by scoring the opener and setting up Federico Bernardeschi for a second as Juventus kept their perfect record in Serie A after five games with a 2-0 win a promoted Frosinone on Sunday.

The Portugese star had threatened several times at the Stadio Benito Stirpe but finally found a way through nine minutes from time, and then helped Italian Bernardeschi to score Juve's second four minutes into injury time.

The five-time Ballon d'Or winner had scored his first goals last week with a double in a 2-1 win over Sassuolo, before the 33-year-old was sent off on Wednesday in a 2-0 Champions League win over Valencia.

Juventus -- the only unbeaten team in Serie A -- have 15 points from five games, three points ahead of Napoli who beat Torino 3-1 earlier on Sunday.

Seven-time reigning champions Juventus and Napoli, last season's runners-up, will go head-to-head next Saturday in Turin.

Frosinone had frustrated the champions for long periods but caved in late and have now conceded 12 goals to remain second bottom of the table with just one point.

Earlier Lorenzo Insigne bagged a brace to inspire Napoli to a 3-1 win in Torino as Roma plunged further into crisis with a 2-0 loss at Bologna.

In Turin, Ancelotti switched things around following Napoli's uninspiring goalless draw at Red Star Belgrade in the Champions League midweek.

Insigne played a more central role along with Dries Mertens as defender Sebastiano Luperto got his first start for the Serie A runners-up.

"I'm satisfied, we dominated in Belgrade but we couldn't finish things off like we did today," said Ancelotti.

"Insigne was decisive, but everyone put in a strong performance." The Italy winger got the first after just four minutes when poor Torino defending saw Emiliano Moretti clear to Nicolas N'Koulou with the rebound favouring Insigne, who finished off under the crossbar.

Simone Verdi added the second with a half-volley on 20 minutes, with Torino pulling one back after the break when Andrea Belotti slotted in a penalty. But Insigne restored Napoli's two-goal lead after 59 minutes. Torino are in 15th position with five points from as many games.

- Roma in crisis -
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"There's no inner fire."