Inter reclaimed top spot in Serie A with a nervy 2-0 win at Venezia on Wednesday, while Samuel Mbangula's hat-trick inspired Bologna to a 4-2 victory at AC Milan and Juventus stumbled again at Genoa.  - Juventus slip up again -   Juventus's shaky start continued with a 2-0 defeat away to Genoa, while Napoli thrashed Monza 4-1.