Arsenal suffered a 1-0 defeat against Atletico Madrid on Thursday night.
Diego Costa scored the only goal of the game during added time of the first half.
The second half produced no other goal despite both sides playing their hearts out.
Arsenal were held to a one all draw in the first leg at the Emirates last week, hence the second leg results implies Atletico Madrid have qualified for the final 2-1 on aggregate
They will face either Olympique Marseillle or Salzburg in the other semi finals clash.
Ghanaian midfielder Thomas Partey who was deployed to the right back position excelled in the game.