The 33-year-old defender joined the capital side from Bayer Leverkusen in 2007 and has established himself as one of the top stoppers in Serie A over the past half-decade, nearly always featuring for his side when fit.
Speaking to Sky Sports, the Brazilian affirmed that he's doing well in Luis Enrique's team despite an inconsistent season: "I work every day to be well, to play and perhaps even to win something important with Roma."
Looking ahead to this weekend's derby with crosstown rivals Lazio, Juan believes the game will be memorable as ever.
"Surely it's a special game," he noted.
"In five years at Roma I've experienced many beautiful moments. One can tell after the first derby just how beautiful the match is.
"They are always difficult confrontations and special matches."
The Brazilian's contract with the capital club expires in June 2013.
How do you stay up to date with football when on the move? With http://m.goal.com – your best source for mobile coverage of the beautiful game.