(CNN) -- Inter Milan have extended their lead at the top of the Serie A table following a 2-0 win at Catania on Wednesday, despite playing for an hour with just 10 men.
Dejan Stankovic celebrates his goal as Inter moved six points clear of Juventus at the top of Serie A.
The Italian champions are now six points clear at the top after nearest rivals Juventus suffered a shock 2-1 defeat at Udinese, who won for the first time in 12 matches.
To complete a great evening for Jose Mourinho's side, city rivals AC Milan were held 1-1 by Genoa -- and are now eight points behind in third place.
Inter took a fifth minute lead when Julio Cruz escaped down the right, turned inside his marker and crossed with his left foot for Dejan Stankovic to glance home a header.
Ghana midfielder Muntari Sulley was then shown a straight red card for a foul on Giacomo Tedesco on 31 minutes, giving Catania hope of a recovery.
But 20 minutes from time Zlatan Ibrahimovic latched onto Stankovic's long pass forward, chipped stranded goalkeeper Albano Bizarri and collected the ball before slotting home.
Udinese ended their dismal recent run with a superb victory over Juventus. Fabio Quagliarella gave the hosts the lead on 20 minutes after a break involving Antonio Di Natale and Kwadwo Assamoah.
Di Natale added a second 16 minutes from time but three minutes later Vincenzo Iaquinta pulled a goal back from the penalty spot to set up a nervy finale.
At the San Siro, Diego Milito equalised three minutes from time to deny David Beckham a winning goal as AC Milan were held to a draw by Genoa.
Just three days after scoring his first goal for Milan, Beckham netted his second with a stunning free-kick into the top corner. However, Serie A's joint top scorer Milito poked home from close range late on to dampen home fans celebrations.