The 28-year-old who scored one of the goals in the first-leg believes Rossoneri will need to work extra hard at Barcelona in order to protect their 2-0 cushion
Ghana midfielder Sulley Muntari is already envisaging a tough task at Camp Nou next three weeks despite helping AC Milan to record a 2-0 victory in the first-leg on Wednesday night.
The 28-year-old scored the second goal after fellow Ghanaian Kevin-Prince Boateng broke the deadlock in the first half in the first leg of the round of 16 stage of the Uefa Champions League at San Siro.
A draw will be enough to take the Rossoneri, the seven-time champions through to the quarter-final stage.
But Muntari admits Barcelona are very dangerous at Camp Nou, thus the need to work extra hard.
“In the Camp Nou it is not easy, you could win four or five but they can do crazy things as this is Barcelona," the former Inter Milan midfielder said on his personal website.
“We have a two-goal advantage and we will try our best to do well.”