Should Roma win their current game in hand, Nainggolan's side would move just two points off the top of the table, although the Belgian international has suggested that he is not looking too far into the future.
"Scudetto? I don't want to hear anyone talking about it," the midfielder told Sky Sports News.
"We are on a good run. Di Francesco has everyone feeling important, even those who don't play a lot. Those players are aware that they can be called on at any time, and they will give their best with their opportunity."
Roma are next in league action when they take on fourth-placed Lazio after the international break.