MILAN, Oct. 7 (Xinhua) -- Walter Samuel muscled in a header to give Inter a 1-0 win over cross-city rivals AC Milan on Sunday.
Inter striker Antonio Cassano, who had switched sides at the San Siro before the start of the Serie A season, was expected to shine, but veteran center-back Samuel stole the limelight in the third mintue with a headed goal.
Riccardo Montolivo was denied the chance to restore parity courtesy of a controversial call from referee Paolo Valeri, but AC Milan only had themselves to blame for failing to capitalise when Yuto Nagatomo's dismissal put Inter on the back foot for much of the second half.
AC Milan head coach Massimiliano Allegri accused the referee of ruining the Milan derby as well as his side's chances.
"Seeing as I never talk about referees, I' m afraid I have to now. The referee affected the game," he said.
"I have no idea what the referee whistled for on the Montolivo goal. Let's just say he was unlucky on the decisive incidents, as the goal would' ve been crucial," he said.
Allegri's Inter counterpart Andrea Stramaccioni found himself impressed by his players' dedication in the game.
"I saw two great things, which were the approach Inter took to the derby, especially right at the start. I had not seen such aggression and determination from my men often," he said.
Serie A champions Juventus rode a little luck as a late winner from Claudio Marchisio helped them won 2-1 at Siena.
Andrea Pirlo gave the Bianconeri the lead with an early free-kick, but the league leaders were pegged back in first-half stoppage time by Emanuele Calaio's equaliser.
However, the visitors refused to settle for the draw and secured all three points five minutes from time when Marchisio volleyed home the winner.
Juve's stand-in coach Massimo Carrera conceded Juventus lacked determination.
"We should' ve won this game much earlier, but lacked determination today and this is why we had to suffer until the end," he said.
"We are unbeaten in 46 rounds and this season won six out of seven. Obviously we can be lacking some sharpness at times, but you cannot win 4-0 every time," he added.
Napoli joined Juventus at the top of Serie A with a hard-earned 2-1 win over Udinese at the Stadio San Paolo.
Marek Hamsik gave Walter Mazzarri's side the lead in the 31st minute, but Giampiero Pinzi responded for the Zebrette, who simply would not lie down.
But Goran Pandev restored the home side's lead on the stroke of half time and they defended resolutely throughout the second half to pick up their sixth win in seven Serie A matches, leaving Udinese struggling in the bottom half of the table with only one win all season.
Roma bounced back from their 4-1 defeat to Juventus a week ago to pick up all three points at the expense of Atalanta, winning 2-0 at the Stadio Olimpico.
Stevan Jovetic's early goal earned Fiorentina a 1-0 victory at home to Bologna. The Montenegrin forward tapped home from close range after the ball broke to him in the seventh minute. Luca Toni also had an effort ruled out for offside as the hosts dominated proceedings.
Pescara's mini-revival was ended in emphatic fashion as Lazio ran out comfortable 3-0 winners at Stadio Adriatico.
Catania made it another trip to Sicily to forget for 10-man Parma as goals from Alejandro Gomez and Gonzalo Bergessio sealed a comfortable 2-0 victory.