( CNN ) -- Defending champions Inter Milan face the prospect of losing the Italian league lead to their bitter city rivals after being held 1-1 by Palermo in Sicily on Saturday evening . Jose Mourinho 's team could not reproduce the form that saw them so convincingly knock his former team Chelsea out of the Champions League on Tuesday . Inter moved two points clear of second-placed AC Milan , who can go top of Serie A for the first time this season with victory against Napoli on Sunday . The Nerazzuri took the lead after only 11 minutes against Palermo , with Argentina forward Diego Milito scoring a penalty after Lucio was fouled by Cesare Bovo . But Edison Cavani leveled just 13 minutes later after good work by Fabrizio Miccoli , earning a point that put Palermo two points ahead of Juventus in fourth place and extended their unbeaten home run to 23 matches . Inter , who had a 10-point advantage over Milan earlier in the season , have now won just once in their last seven league matches . Roma consolidated third in the table with a 4-2 win at home to Udinese , moving to within four points of Inter , who they face next weekend . Montenegro striker Mirko Vucinic scored a hat-trick , with two goals in the final 25 minutes killing off the visitors after Antonio Di Natale had drawn them level with a second-half double . Fiorentina moved to within a point of seventh-placed Genoa after crushing the Rossoblu 3-0 at home with goals from Mario Santana , Alberto Gilardino with a penalty and teenage substitute Khouma Babacar .
Inter Milan face prospect of losing Udinese league lead to their bitter city rivals . Defending champions move two points clear of Inter Milan , who face Palermo on next weekend . Napoli go two points ahead of Juventus in fourth place . Roma consolidate third place with 4 -2 victory over Udinese with Mirko Vucinic treble .