Four players scored for Roma in a dominant victory over Torino at the Stadio Olimpico.
Inter Milan coach Stefano Pioli told his squad "we've achieved nothing yet" after watching them record a ninth win in 10 games by beating Bologna 1-0.
Gabriel Barbosa came off the bench to hand Inter Milan a late 1-0 win over Bologna.
Gabriel Barbosa came off the bench to score his first Serie A goal and seal three points for Inter at Bologna.
Inter Milan have won eight of nine & as last week against Empoli showed, playing with three at the back is an experiment worth continuing at Bologna.
Atalanta registered their third straight Serie A win and extended their unbeaten run to five matches thanks to a 1-0 home victory against Crotone.