However, Bristol loanee Mama has suggested that Zebre's intensity from the start proved decisive.
He told the Worcester News: "It was a pretty tough game away from home against a side who were really enthusiastic and fired up for the contest.
"We started off pretty poorly and I don't think we were ready for it. All credit to Zebre. I think they were better prepared for the game than us.
"They came out fighting and put a lot of pressure on us through their set-piece and that's why they started so strongly and scored those early points."
Worcester's only try in Italy came courtesy of Dean Hammond's late consolation score.