The match will take place on Friday 7 August, with kick-off at 20:00 (UK).
Should we beat Madrid, we will face Lyon or Juventus in the quarter-final and if we reach the last four, we'll play Napoli, Barcelona, Bayern Munich or Chelsea.
The quarter-finals, semi-finals and final will take place in Lisbon, Portugal from 12 to 23 August.
All of these games will be played behind closed doors and will be one-leg knockout ties.
Find out more, here.