Roma boss Paulo Fonseca hailed his players' "courage" after victory at Bologna.
Edin Dzeko headed a winner in the final seconds - after Gianluca Mancini received a second yellow card for a raised elbow on Federico Santander.
"We played well and I thought dominated throughout the match," Fonseca told Sky Sport Italia.
It's true that in the second half Bologna pushed on the counter-attack and created scoring opportunities, but we deserved the victory for our character, unity and courage."
He added: We know that our playing style involves running some risks, but that is what we have decided, that is our approach and we're not going to change it.
I have adapted slightly and I think this version is more realistic in Serie A, but we always want to go for the win. I think everyone in the side is happy with the way we are playing, so they are enthusiastic and motivated."
