The Bianconeri were far from their best at Stadio Olimpico and went in at the break 2-1 down, Jordan Veretout netting a brace either side of a Ronaldo spot-kick.
Juve’s chances of clawing their way back into the game suffered a blow when Adrien Rabiot was dismissed for a second bookable offence after 62 minutes, but Ronaldo secured a point with a towering header seven minutes later.
Despite Roma dominating for long periods, Ronaldo was pleased to leave the capital with a point and believes the Bianconceri are in for another successful season.