AC Milan have gone top of the Serie A table after beating Bologna 4-2 in a chaotic match at the Stadio Renato Dall'Ara on Saturday night.
Ibrahimovic - on his first start of the season - is the fourth player to score a Serie A goal after his 40th birthday, along with Milan legend Alessandro Costacurta, 41, and 40-year-olds Silvio Piola and Pietro Vierchowod.
He was the first 40-year-old to set up a Serie A goal since Francesco Totti in February 2017.
Ibrahimovic's own goal was only the second he has scored in a league game in his career - after another one for Milan in a 3-1 home win over Chievo in 2010.