Giorgio Chiellini's last-minute header gave Juventus an extraordinary 3-2 win at Cagliari in their second game back in Serie A on Sunday.

Juve's Jonathan Zebina and Cagliari's Cristiano Del Grosso were sent off in a fiery encounter in Sardinia, where the home side equalised twice with debatable penalties before defender Chiellini nodded in Mauro Camoranesi's free-kick.

Italy midfielder Alberto Aquilani, French winger Ludovic Giuly and striker Francesco Totti scored in AS Roma's 3-0 win over Siena, while promoted Napoli triumphed 5-0 at Udinese.

Goals were again plentiful on a generally enthralling day of action in Italy, with Palermo winning 4-2 at Livorno, who were battered 5-1 by Juve last weekend.

Juve failed to carry that form into the first half at Cagliari with the home side arguably threatening more without really testing ‘keeper Gianluigi Buffon. However, the second half was packed with incident after David Trezeguet gave Juventus a fortunate lead when the ball ricocheted off team-mate Camoranesi and ran into his path, enabling him to score.

Cagliari were almost immediately awarded a penalty when substitute defender Nicola Legrottaglie was adjudged to have held back Alessandro Matri. Buffon got a hand to Pasquale Foggia's spot kick but the ball rolled over the line.

Alessandro Del Piero put Juve ahead again when he tapped a Camoranesi cross which may have gone in anyway.  Cagliari's Foggia equalised with another penalty 10 minutes from time when Zebina was penalised for a foul, and the French defender was so incensed he talked himself into a red card.

Del Grosso made it 10 against 10 when he was dismissed for a second booking and Juve finally settled a thrilling game to top the table alongside Roma with two wins from two.