Atletico Madrid 1-0 Arsenal (Agg: 2-1): 5 Talking Points

#2 Diego Costa shows Chelsea what they've been missing all season

Costa was exceptional on the night.

The build up before the game was all about one man and one man only. Diego Costa. The former Chelsea man has been at the heart of all the talk before the game with both managers singling out the Spanish forward as the most dangerous threat.

Diego Simeone had warned Arsenal that the Brazilian born goal-scorer is gunning for them ahead of the second leg. Similarly, Arsene Wenger had cautioned his team against the attacker looking back at the success he has had against his side.

On the night, Costa showed just why he is, still, one of the most lethal strikers in the world. He was at his bullying best as he manhandled the Arsenal back-line with ease and with pleasure, and also scored a goal and created multiple chances for his partner upfront.

Chelsea were League Champions last year and they're struggling to qualify for a Champions League spot at the moment. Anyone notice why?