Diego Costa's goal in San Siro earned Atletico a 1-0 advantage from the first leg, but Simeone knows the job is far from over.
Milan have had an indifferent season in Serie A, but the Argentinian remains wary of the threat posed by Clarence Seedorf's men.
"I'm sure we'll have a tough, tough games because there's a lot at stake," he said.
"The resolution of the game will be in control in the middle of the ...
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