The Bianconeri suffered a damaging defeat to the capital club just days after they beat Celtic in the Champions League.
“I already said before the Fiorentina game that we certainly didn’t like playing three games in seven days,” said Conte.
“We were bound to pay for that with fatigue and one more day would’ve helped us to rest and reorganise. This is the only excuse I can give for today, as we did not play as a team and when we do that anyone can beat us.
“Compliments to Roma, it was a good victory. This is a new Roma, so we didn’t have much to go on in preparing for them. I wish I’d had more information, as we could’ve done better.”