Claudio Marchisio scored twice after the 86th 0, on Sunday at Juventus Stadium to remain unbeaten and move to the top of Italy's Serie A.
Juve won for the third time through five matches, with draws in the other two, and sits level on 11 points with Udinese atop the table. Milan lost its second of the season against just one win and two draws.
Following more than 85 minutes of scoreless action, Marchisio broke the match open with just three minutes left in normal time when he scored to the bottom right from the middle of the area.
Kevin-Prince Boateng was sent off two minutes later for Milan for his second yellow and Marchisio sealed Juve's victory 2 minutes into stoppage time with a volley from outside box that went through goalie Christian Abbiati's legs.
Milan is just four points off the bottom in 15th.
Udinese 2, Bologna 0
Udine, Italy - Udinese remains unbeaten in Serie A through five games after the club notched a 2-0 win over Bologna at the Stadio Friuli on Sunday.
Medhi Benatia scored midway through the first half and Antonio Di Natale secured all three points with a penalty kick 19 minutes from time.
Udinese owns 11 points from five games to move to the top of the league, while Bologna's struggles continue with the club slipping to the bottom of the table after four losses in five games.
Lazio 2, Fiorentina 1
Florence, Italy - Lazio moved past Fiorentina in the top half of the table with a 2-1 win over the Viola at the Stadio Artemio Franchi on Sunday.
Alessio Cerci had the home side ahead after seven minutes, but his opener was canceled out by Lazio's Hernanes, who tallied his second goal of the season midway through the opening half.
The decisive goal arrived seven minutes from time when Miroslav Klose scored his third goal of the campaign, moving Lazio into the top half of the league.
Novara 3, Catania 3
Novara, Italy - A stoppage-time goal from Alejandro Gomez preserved Catania's unbeaten start to the Serie A campaign on Sunday as the club finished in a 3-3 draw with Novara.
Nicola Legrottaglie tallied the lone goal in the first half for Catania, but Marco Rigoni equalized early in the second half from the penalty spot for Novara.
Francesco Lodi's goal put Catania back in front, only for Novara to counter with goals from Takayuki Morimoto and Neves Jeda to move in front with six minutes to play.
However, Catania recorded its fourth draw in five games when Gomez collected his first goal of the season in the first minute of added time.
Cesena 0, Chievo 0
Cesena, Italy - Adrian Mutu failed to convert a second-half penalty kick which could have given Cesena its first win of the season, forcing the team to settle for a 0-0 draw with Chievo.
Cesena entered the match having lost its first four games, but was given a chance to take the lead from the penalty spot in the 60th minute, only for Mutu's effort to be saved by Chievo goalkeeper Stefano Sorrentino.
Cagliari 2, Lecce 0
Lecce, Italy - Cagliari's strong start to the new Serie A season continued on Sunday with a 2-0 win at Lecce that gives the club 10 points from five games.
Ribeiro Thiago scored 10 minutes into the game and Davide Biondini doubled the lead shortly before halftime, with Cagliari seeing out the second half to secure its third win of the season.
Lecce has lost three of its first five games and sits in 18th place.
Palermo 2, Siena 0
Palermo, Italy - Palermo secured a 2-0 victory over Siena at the Stadio Renzo Barbera on Sunday despite playing the final 35 minutes of the match with 10 men.
Palermo's Giulio Migliaccio put his team up with a first-half goal, but the home side was reduced to 10 men when Federico Balzaretti was sent off in the 55th minute.
Despite playing down a man, Palermo still was able to seal the win just before the final whistle as Abel Hernandez converted a penalty kick four minutes into added time.
Parma 3, Genoa 1
Parma, Italy - Sebastian Giovinco scored a pair of goals in the first half to propel Parma to a 3-1 triumph over Genoa on Sunday.
Giovinco has been in top form so far this season and he put Parma in front just before the half-hour mark.
The former Juventus man then doubled the lead from the penalty spot in the 41st minute, giving him five goals on the season and putting the hosts up 2-0 at the break.
Stefano Morrone made it 3-0 early in the second half and Genoa was only able muster a stoppage-time penalty kick from Rodrigo Palacio in response.