The visitors twice came from behind to deny Roberto Mancini's side, who would have lifted their third consecutive Scudetto had they claimed victory.

Former Arsenal midfielder Patrick Vieira headed in from close range to give Inter the lead before ex-Middlesbrough striker Massimo Maccarone equalised on the hour mark. Mario Balotelli restored Inter's advantage just before the break, only for Siena to again draw level through Houssine Kharja's long-range strike after 70 minutes.

Roma's 2-1 win at home to Atalanta ensured the race for the title will go down to the final weekend. Christian Panucci and Daniele De Rossi scored for the Giallorossi.