Radja Nainggolan has admitted he despises Juventus and promised Roma fans they will take either the Scudetto or the Coppa Italia off of them this season.
Nainggolan was filmed telling supporters his hatred of all things Juve stretches back far further than the two clubs' current competitive rivalry.
The Bianconeri have won five Serie A titles in a row and made it a league-and-cup double in each of the last two seasons, with Roma trophyless since 2008.
They currently lie seven points behind Juventus in the Italian top flight but Nainggolan says if they cannot catch them in the league, they will beat them in the cup instead.
In that competition, Juventus have been drawn against Napoli in the semi-finals and Roma will face rivals Lazio.
"I am one who has always been against Juventus," Nainggolan said in the video published by Corriere dello Sport.
"I hate Juve, always. At Cagliari I’d have given my balls to beat Juve - at the Juventus Stadium I always drew with Cagliari against them.
"They won the Scudetto against us when we were [temporarily playing home games] in Trieste. I hate them because they always win with a penalty or a free-kick.
“I came to Roma to win something against Juventus. If we don’t win the Scudetto we’ll win the Coppa Italia, I tell you that. Against Lazio in the semi-finals we’ll win both [legs], trust me."
Juventus heightened the rivalry between the two clubs in the summer by signing star Roma man Miralem Pjanic to replace outgoing midfielder Paul Pogba.
But while a switch to Turin seems unlikely for Nainggolan any time soon, the tough-tackling midfielder insisted the potential backlash from Roma fans would not put him off the idea of leaving the Stadio Olimpico.
"I could leave Rome, I would not give a s*** about the insults," he added.
The first legs of the Coppa Italia semis will take place on March 1, with the return fixtures scheduled for April 5.