Neither side could find the net in the Milan derby, while Roma missed the chance to go second.
Bostjan Cesar's own goal cost Chievo an important Serie A win at home to Udinese on Sunday as they drew 1-1.
Palermo's long wait for a second Serie A away win of the season came to an end with a 3-1 triumph at Udinese on Sunday.
Silvestre Varela fired relegation-bound Parma to a long overdue victory to inspire a faint glimmer of hope at the club.
Genoa avoided a third straight defeat as they claimed a 1-1 draw against Udinese at the Stadio Luigi Ferraris.
Juventus closed in on a fourth straight Serie A title after a 2-0 victory over Empoli.
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