Should United make it past Bayern Munich and Lyon or Bordeaux in to UEFA Champions League final, they will face either Barcelona or Inter Milan.
A whirlwind performance by Lionel Messi netted him all four of Barcelona's goals as they romped to a 4-1 win over Arsenal at Camp Nou, giving them a 6-3 aggregate win.
Earlier in the day, the 10 men of CSKA Moscow flopped out of the competition, losing 1-0 at home on the night and 2-0 on aggregate to Inter Milan.
Tomorrow night, United take on Bayern Munich at Old Trafford and, with the tie locked at 2-1 in the Germans' favour, the reds need to score one goal to go through to the semi final.
They would play the winners of Lyon and Bordeaux, who go into their return match with hosts Bordeaux 3-1 down.
Should United go through, we will bring you all the best ways of getting to the semi final away leg right on full time.