Serie A: AC Milan rollercoaster, Totti hits hat-trick

AC Milan were imperious in attack but woeful defensively in a 4-3 home win over Cagliari on Sunday which summed up their topsy-turvy season.

Ronaldinho celebrates with coach Leonardo.

• Saturday's round-up

Clarence Seedorf gave the hosts the lead in the fifth minute, but Alessandro Matri replied within five minutes and Andrea Lazzari gave the Sardinians a deserved lead after half an hour. But two goals in as many minutes earned Milan the half-time lead with Marco Borriello and Alexandre Pato on target.

A penalty by Ronaldinho gave the Rossoneri a two-goal advantage in the 62nd minute, but they were made to sweat for their third straight league win when Nene reduced the arrears in the 69th minute.

Juventus edged past Udinese 1-0 to move into second place behind Inter Milan. A solitary goal from Fabio Grosso sealed three points, the full-back slotting home from close range after Martín Cáceres' right-wing cross. Udinese came close to an equaliser in stoppage time but Christian Zapata's shot was saved by Gianluigi Buffon.

The game also saw a return from injury for Alessandro Del Piero, who came on as a second half substitute for his first appearance of the season.

Francesco Totti marked his return from almost two months out injured with a 28-minute hat-trick in AS Roma's 3-1 win over Bari on Sunday.

Out since October 4 because of a knee injury, the Roma captain made a dramatic comeback, notching his first from the penalty spot after six minutes. His second came eight minutes later from a set-piece and he smashed home a loose ball from inside the area just before the half-hour mark to make it 3-0.

Bari reduced the arrears with an own goal by Marco Andreolli on 77 minutes but could not find a way back into the game. The outcome left Roma 11th in the standings - six points behind fourth-place Sampdoria, who hold the last Champions League qualifying spot.

Walter Zenga's Palermo drew 1-1 at home with his former club Catania in the Sicilian derby; while early pacesetters Sampdoria beat Chievo 2-1 in Genoa for their first win in four games. Marco Rossi's 19th-minute goal set the tone and it looked like being a long afternoon for the visitors. Giampaolo Pazzini doubled Samp's advantage but Chievo hit back through a Andrea Mantovani effort with 10 minutes to go.

Napoli drew 0-0 at home with Lazio. Napoli's unbeaten run at the Stadio San Paolo continued but they were unable to break down Lazio and shared the spoils with the struggling Roman outfit.

At the bottom Siena are three adrift after a 2-0 home defeat by Atalanta which prompted supporter protests and further weakened the position of interim coach Marco Baroni. Simone Tiribocchi gave the visitors the lead after 52 minutes and Robert Acquafresca looked to have sealed the win 16 minutes later from the penalty spot. Siena were gifted the chance to get back into the game on 78 minutes but Michele Paolucci saw his penalty saved

Lowly Livorno grabbed a very late winner to beat Genoa 2-1. Genoa had taken seven points from the three previous rounds of Serie A matches and were looking to build on that run of form, and a draw looked highly likely as the match neared its conclusion, after Domenico Criscito had cancelled out the home team's opener from Cristiano Lucarelli. However Pulzetti had the final say in the third minute of stoppage time, arriving to head home a dramatic winner.