Chelsea forward Alvaro Morata has claimed that his team will have to be at their best to pick up a positive result from Tuesday's Champions League group match against Roma.
The clash will come less than two weeks on from their meeting at Stamford Bridge, which ended 3-3.
Chelsea beat Atletico Madrid in their last away Champions League fixture, but Morata has said that Roma "have something extra over Atletico" as the Blues prepare to take on potentially their toughest assignment in Group C.
"Roma impressed me in London," Morata told Gazzetta dello Sport. "They deserved to win. This time, however, we start from scratch and after these three wins in a row, I think Chelsea will be more fired up.
"They posed us several problems in London. We played the perfect game in Madrid, but Roma have something extra over Atletico."
Chelsea currently sit top of Group C on seven points from three matches - two points clear of second-placed Roma. Atletico, meanwhile, are currently down in third on just two points.
