Diego Costa was delighted to prove Atletico Madrid's matchwinner in victory at AC Milan.

Diego Costa swooped for a late Champions League winner at the San Siro.

"It was a very difficult game against a very tough team, but we always manage to score in the key moment," he told Sky Sport Italia.

"We had to keep our cool when under pressure, as we knew we'd have our chances eventually.

"We know that the tie is not finished yet. We have good result from the first leg, but Milan are a great side and anything can happen."

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