"It was an entertaining game for the spectators, a little less for us. We knew Roma were strong in space, but there were incidents we should've avoided," the Coach told Sky Sport Italia.
"In the end it's a good result, as we used up so much physical and psychological energy on Wednesday for the Champions League and could've paid for that.
"We could've done more when on 1-1, but made the wrong decisions on passes between the lines."
Allegri was sent off during a very tense moment of the match, when Riccardo Montolivo was booked for dissent.
"Let's just ignore the refereeing decisions. I accept them, I am sorry to have gone off the field and left my team - even though it went well, as we scored afterwards! Montolivo was talking to the referee, he is the captain and didn't touch the official, so I don't see why he was booked. It's a shame, as Montolivo will now be suspended for the derby.
"I think we played some good football in the second half and we did well to emerge from Roma's pressing. There were three or four occasions when Mattia De Sciglio was clear down the right, but it didn't reach him due to a bad control or a misplaced pass."
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