Reigning champions Inter Milan suffered their first Serie A defeat of the season as they lost a bad-tempered game 3-1 to Lazio on Saturday, while AC Milan fought back from two goals down against Verona to go top of the table.
AC Milan staged a brilliant comeback at the San Siro to stay unbeaten and prove their title credentials as they look for a first Scudetto since 2011.
Stefano Pioli's men were staring at a first league defeat of the campaign when trailing at half-time to early goals for Gianluca Caprari and Antonin Barak.
But Olivier Giroud's header just before the hour mark gave Milan hope, and Franck Kessie drew them level in the 76th minute with a hotly-debated penalty.
Ibrahimovic was introduced after that goal for his first appearance in over a month and a cross aimed towards the veteran striker was comically turned into his own net, through his goalkeeper Lorenzo Montipo's legs, by Koray Gunter just seconds later.