An early goal from Antonio Rudiger had Roma on its way but a disappointing second half saw AC Milan salvage a 1-1 draw.
Roma coach Rudi Garcia said his side switched off in the second half of its 1-1 draw with AC Milan on Saturday.
Garcia's men took the lead just four minutes into the game when German defender Antonio Rudiger scored his first goal for the club.
However, Juraj Kucka opened his account for Milan as he levelled proceedings just minutes into the second half.
Garcia rued the lack of consistency from his side at the Stadio Olimpico.