Biancocelesti fans have already hit out at the defender for joining their arch-rivals, and he has done little to calm the fury
Aleksandar Kolarov says he cannot deny his past but that Lazio are his rivals now after leaving Manchester City for Roma.
Left-back Kolarov won the Coppa Italia with Lazio in 2009 but left for City a year later, going on to win the Premier League twice at the Etihad Stadium.
His return to Rome was confirmed on Saturday, the Serbia international signing a three-year contract with Lazio's arch-rivals.
And Lazio fans have already reacted negatively, unveiling a banner labelling him "a worm" at a pre-season friendly, and Kolarov has fanned the flames further.