The midfielder, who joined from Cagliari this month, says the Giallorossi were the best option for him and hopes he can prove his worth by helping the team push for the title
The Giallorossi were reduced to nine men as they were beaten 3-0 by the defending champions, seemingly cutting short their title punt as the Bianconeri carved out a formidable eight-point lead at the Serie A summit.
Nainggolan made his debut under Rudi Garcia in a 1-0 Coppa Italia win over Sampdoria in midweek, having joined from Cagliari a few days prior, and he thinks that Antonio Conte's men should not presume to have a third Scudetto in a row in the bag.
"We are in the title race, because it is only eight points and Juventus still have to play in Rome," the Belgian told reporters on Friday. "Roma cannot go wrong too many times more, but as long as the maths make it possible then you have to believe.
"I am convinced that this team can do well and cause trouble for many teams. I will try to provide my contribution and to win something.
"I think the ambition of every player is to get as high as possible. I have come to Roma with the thought of doing well here and getting as high as I can."
Nainngolan was subject of much transfer interest from the likes of Napoli and AC Milan, but he says that the Stadio Olimpico side's persistence paid dividends and that he wants to show his worth to the club.
"Roma tried to sign me last year," the 25-year-old revealed. "The project following a disappointing year is important, there were other teams, but I think that this project is the best for me and that is why I have chosen Roma.
"Certainly it is very important to play well for this team, they have invested in me. I am looking to repay everyone, demonstrating so with my performances in the field.
"I have played four years as an inside-left midfielder, but I will do my best anywhere, to help the team. The team selection will be down to the coach. I am convinced of my qualities, I am a fighter and I will try to make it difficult for the coach."
Roma host Genoa on Sunday as they look to bounce back from being beaten by Juve last weekend.