Cristiano Ronaldo scored as Juventus resumed their Serie A title defence with victory at mid-table Bologna.
Juve, who have won the past eight titles, are four points clear of Lazio, who visit Atalanta on Wednesday.
Ronaldo gave Juve the lead with a penalty after Matthijs de Ligt was fouled by Stefano Denswil.
Paulo Dybala curled home an excellent second from Federico Bernardeschi's backheel but Juve ended with 10 men following Danilo's red card.
Maurizio Sarri's side were in control in the second half and could have scored more with Bernardeschi hitting the post and Ronaldo having a goal ruled out for offside.