Inter held to goalless draw at Udinese
Pato scores both goals as Milan beat Genoa 2-0 at home
Leaders Inter failed to win in Serie A for the first time in nine matches when they were held to a 0-0 draw at Udinese yesterday.
The unbeaten champions had Brazilian winger Cesar sent off for two quick bookings after just 21 minutes but still had the better chances to beat fifth-placed Udinese with Julio Cruz and strike partner Zlatan Ibrahimovic going close.
Inter's lead from last week has been cut to five from seven points after second-placed Roma beat Palermo 1-0 on Saturday.
Juventus won 3-1 at mid-table Livorno in yesterday's late game to go 10 points behind Inter in third.
Serie A top scorer David Trezeguet hooked in his 14th and 15th of the league campaign either side of Alessandro Del Piero's 49th-minute strike.
Livorno, who grabbed a consolation through Erjon Bogdani, had Daniele De Vezze dismissed for two quick bookings at 2-0.
Juve, who had drawn their last three, host Inter in an Italian Cup quarter-final second leg on Wednesday with the score at 2-2.
Stuttering Milan are out of the cup but rose to seventh in the league after Brazilian striker Pato scored twice in the second half to seal a 2-0 home win over 10-man Genoa.
The 18-year-old has now scored three in his first four games for the club and three in two at the San Siro where Milan had failed to win against Italian opposition before his arrival at the start of the month.
Milan again lacked bite and were wasteful until Pato nodded in after Clarence Seedorf's header across goal on 69 minutes.
Genoa goalkeeper Rubinho was then dismissed for handling outside the box when he denied the onrushing Pato, who was playing upfront alone with Ronaldo again out injured.
He grabbed his second eight minutes from time. Milan have two games in hand including Wednesday's trip to Reggina.
Fourth-placed Fiorentina left it late with Adrian Mutu's 13th league goal of the season and Giampaolo Pazzini's stoppage time strike setting up a 2-0 victory at second bottom Empoli.
Basement side Cagliari are now just three adrift of Empoli after a stunning late comeback against Napoli.
Alessandro Matri and Daniele Conti both scored late in stoppage time to record a 2-1 win, their first since September 30.
Debutant Rolando Bianchi was sent off five minutes after coming on as a substitute in Lazio's 0-0 draw at Torino.