United States midfielder Michael Bradley scored late to help 10-man Roma beat Udinese 1-0 and set a Serie A record by winning their first nine matches of the season.
Bradley came on as a substitute and broke the deadlock with his first touch of the match eight minutes from full time to keep Roma five points clear of Napoli and Juventus.
Roma played the final 24 minutes with 10 men after Maicon was sent off for a second yellow card.
Juventus recorded eight opening victories in 1930-31 and 1985-86, and also won nine straight matches to start 2005-06 but was stripped of its title-winning season in the "calciopoli" match-fixing scandal.
"At the end it was three deserved points, we really gave everything," Bradley said. "This is a team which has great desire and determination."