0 at Siena Sunday to extend its perfect start and reclaim the Serie A lead. Alessandro Matri scored in the 54th minute to finish off a swift counterattack for the Turin powerhouse, which was completely remodeled after finishing seventh last season and missing out on Europe. New Juventus coach Antonio Conte led Siena back into the top division last season, and Juve took advantage of one of its few scoring chances against his former club. Udinese also remained perfect after a 2-0 win over Fiorentina with goals from Antonio Di Natale and Mauricio Isla, while Fiorentina lost forward Alberto Gilardino to what appeared to be a serious knee injury. Juventus, Udinese and Cagliari – which beat newly promoted Novara 2-1 Saturday – have six points each but Juventus has the edge over Udinese on goals scored. Later, defending champion AC Milan faced a tough test at Napoli, while on Saturday struggling Inter Milan and Roma drew 0-0. Genoa rallied to beat Lazio 2-1 with two second-half goals. In Sicily, Catania beat Cesena 1-0 with a penalty from Maxi Lopez just before halftime. Also, Sebastian Giovinco scored an injury-time winner to give Parma a 2-1 victory over Chievo Verona. Lecce won 2-0 at Bologna with goals from a pair of Uruguayan midfielders, Guillermo Giacomazzi and Carlos Grossmuller. Atalanta remained unbeaten with a 1-0 win over Palermo in a game that was suspended for more than 30 minutes in the second half due to a torrential rainstorm.