Former Inter Milan star Ze Maria sees next week's clash with Napoli as a must-win.
Inter meet Napoli on January 4 needing victory to reign in the runaway Serie A leaders.
"I believe that Napoli will play their game and Inter will have to try to win at all costs otherwise it will become difficult to think of recovering ground on the Azzurri," said Ze Maria.
"I think it will be a spectacular game from all points of view.
"The Scudetto race? I think Milan is also great, it is the team to beat because it won the last championship. I think it's a threesome between Napoli, Milan and Inter. I would be really happy if Napoli won the championship."