Atletico took that momentum into the second half .
Diego Costa -- a reported Chelsea target -- put Atletico in front from the penalty spot with his 36th goal of the season after substitute Samuel Eto'o brought him down in his first involvement in the game .
Atletico took that momentum into the second half and Diego Costa -- a reported Chelsea target -- put them in front from the penalty spot with his 36th goal of the season after substitute Samuel Eto'o brought him down in his first involvement in the game .