Roma beat Lazio 2-0 in a typically frantic derby to maintain their dominance in the fixture.
Having battled back from career-threatening knee injuries, Kevin Strootman pounced on an error from Lazio defender Wallace to put Roma on their way to victory midway through the second period at a half-full Stadio Olimpico - both club's 'ultra' fans remain unhappy at changes made to the stadium in an attempt to segregate unruly supporters.
The Giallorossi are now unbeaten in eight derby games - their best run for 12 years.
Victory for Roma sees them remain four points behind Serie A leaders Juventus, having taken second place in the table back from AC Milan after their victory earlier on Sunday, with Lazio missing out on the chance to leapfrog their city rivals.
Ciro Immobile blasted two good opportunities over the crossbar as Lazio made the early running against Roma's new-look back three, which was happy to sit deep and soak up the hosts' attacks.
Eventually Luciano Spalletti's system began to click and a spell of Roma dominance resulted in a moment of high controversy.
Lazio were incensed at the decision, prompting Banti to convene with his assistants on the line and behind the goal, before eventually overturning his decision and awarding a Roma free-kick outside the area, in turn angering the Giallorossi, who wasted the set-piece opportunity.
A string of tetchy Lazio fouls gave the game a bitter aftertaste, but winning four derbies in sequence for the first time in five years will be sweet enough for Roma, whose players celebrated in front of a barren 'Curva' after Francesco Totti and Daniele De Rossi's please for the ultras to attend had been ignored.
