Cengiz Under hit the winner at the Sardegna Arena this evening.
“We knew this was going to be difficult, as it has been in the past for Roma too," Nainggolan told Mediaset Premium.
“We take these three points, on the other hand I am a little sad, as now Cagliari really face a difficult fight to stay up. Our journey continues.
“Now we've got Juventus next week, a game that means a lot to us and we'll battle for honour."