Lorenzo Pellegrini's goal was his first of the 2025-26 season
Lorenzo Pellegrini fired Roma into the Serie A top four as Lazio had two players sent off in a fiery derby.
The midfielder found the bottom corner in the 38th minute as Roma extended their unbeaten run to four games against their city rivals.
Lazio have lost three of their opening games of the season and had Reda Belahyane and former Arsenal midfielder Matteo Guendouzi dismissed in late drama.
Roma started well and Rome-born Pellegrini claimed the vital goal - his fourth in a Rome derby after being available for transfer in the summer - following good work down the right by Matias Soule.
But the hosts will rue missed opportunities as Boulaye Dia, Mattia Zaccagni and Alessio Romagnoli all had openings.
With four minutes left substitute Belahyane was shown a red card for a late studs-up challenge on Manu Kone.
Danilo Cataldi struck the outside of the post for Lazio in a last-gasp effort to snatch a point, while team-mate Guendouzi was sent off for dissent after the final whistle.
