Barcelona and Manchester United will face each other in the Europa League knockout round play-offs following Monday's draw.
The winners of the eight knockout round play-off ties will advance to the last 16, for which the eight Europa League group winners all qualified automatically. They have met in two Champions League finals and in the 1991 Cup Winners' Cup final, but this will be the first ever encounter of the sides in the Europa League. Barca were eliminated from the Champions League group stage to drop into the Europa League for the second season running, while United came second in their Europa League group.