The Ivorian said that a "great performance" was required to see off the Russians so convincingly, adding that he does not fear Group E opponents Manchester City and Bayern Munich.
"We were not expecting an easy match, Champions League games are never easy," he told Sky Sports News. "It was not an easy game. Roma put in a great performance, playing well in both halves of the game.
"I do not worry about Man City and Bayern Munich - my concern is never my opponents, but only my team."