Automatic qualification for next year's competition is still the club's ambition, according to the ex-Inter boss, who also hinted at more January signings
The Partenopei currently sit third in Serie A, which would be enough to see them enter the play-off round of next year's competition, with the top two - currently Juventus and Roma - gaining automatic spots to the group stage.
Last weekend's draw with Bologna leaves the Napoli just three points clear of fourth-placed Fiorentina, but Benitez has his sights set on Roma to claim the group stage spot in Europe's elite competition.
"We are looking forwards," the 53-year-old coach said during a press conference on Friday. "We believe that the Champions League is a necessary goal for the club.
"I have said before that we are looking towards the Giallorossi. I do not like to look back. Fiorentina are doing well, but our goal is to surpass Roma and qualify for the Champions League automatically."
Hellas Verona star Jorginho has been the only notable signing for Napoli so far in January but, following the confirmed departure of Eduardo Vargas to Valencia, the ex-Chelsea coach hinted their month's business is not done yet.
"I am not worried [about the lack of signings]," Benitez added. "We know what we want, we are ready to work until January 31 to get it."
Napoli are back in action on Saturday at home to Serie A strugglers Chievo.