The draw features the 12 group winners and 12 runners-up, plus eight teams transferring from the UEFA Champions League (Which have already drawn their last 16) after finishing third in their sections (the four such teams with the best record are seeded along with the UEFA Europa League group winners)
Manchester United and Arsenal were handed tricky draws in the Europa League.
The Gunners were paired with Portuguese outfit Benfica while Manchester United will face La Liga high flyers Real Sociedad.
The round of 32 first legs are scheduled for Thursday 18 February, with the second legs on 25 February. Kick-off times are split between 18:55 CET and 21:00 CET, as they were in the group stage. The round of 16 draw is on 26 February.
Source: Besoccer.com, uefa.com