Andres Iniesta concedes Barcelona were “not on our game” after a 2-0 Champions League defeat away to Milan.
The Blaugrana had ineffective possession at San Siro, but no real scoring opportunities and were beaten by Kevin-Prince Boateng and Sulley Ali Muntari goals.
“We were lacking freshness in terms of ideas. They were well positioned on the field,” Iniesta told UEFA.
“There is a second leg to play and we have to believe that we can come back from this. It will be a different story at our own stadium.
“From the very first minute at the Camp Nou, we’ll be going for it.”
Barcelona’s tempo was remarkably slow and they struggled to make any impact on the Rossoneri defence.
“When you’re not on your game, this happens. It is a poor result,” continued Iniesta.
“This is Milan, it’s the Champions League, so you know anything is possible. We’re looking at a very negative outcome from tonight’s match.”