The Nerazzurri boss believes the Giallorossi will be a match for anyone this season and tipped them to win Serie A
The Nerazzurri were humiliated 3-0 by Rudi Garcia's men on home soil two weeks ago, with the Giallorossi now five points clear at the top with eight wins out of eight.
"It's normal to suffer a little playing against a Roma of that quality," the 52-year-old told reporters ahead of Sunday's clash with Torino. "They look like a team with a top coach. They have every chance of going all the way."
"We lost the game but we didn't play all that badly. Torino have also picked up fewer points than they deserve so far this season. It's going to be another big test for us.
"I'm confident we can put on a good performance. I'd like us to be more clinical and make the most of situations in the final third."
Ricky Alvarez is unavailable for the trip to the Stadio Olimpico, but Mazzarri does not believe under-fire midfielder Fredy Guarin is a suitable replacement in a more advanced position.
"[Mateo] Kovacic is one possibility but I must say it's a shame Alvarez isn't fit," he continued. "In any case I'm confident about whoever comes in to replace Ricky.
"Guarin in the hole? I tried that out [on pre-season tour] in the States. With the attributes he has, he could find it hard receiving the ball in a certain way.
"I wouldn't rule anything out between now and May but it would be wrong to confuse him by giving him a different job to do right now."