Juventus goalkeeper Wojciech Szczesny believes there's four teams competing for the title this season.
Juve sit top of the table equal on points with Inter Milan.
“We do need to improve in defence, because the league title is usually won by the side that concedes the fewest goals," Szczesny told Sky Sport Italia.
“I think we have the quality to do that and must rediscover the desire to fight hard and keep clean sheets. Knowing all my teammates, we'll get there very soon.
“I believe the Scudetto race is between Juve, Inter, Lazio and Roma. A few weeks ago, nobody was talking about Lazio, yet they are the form team right now, while Roma are doing very well too.
“My objective is always to win everything, as it has to be at Juve. There is disappointment that we lost the Supercoppa, but it's a new year, we talked amongst ourselves and now resume with a lot of hunger to win every trophy in 2020."