The competition will be completed with a ‘final eight’ style tournament in Portugal in August with UEFA holding the draw for the final stages on Friday.
Here’s how it looks:
Barcelona must first get past Serie A side Napoli. The teams are currently tied at 1-1 after the first leg in Napoli all the way back in February.
Dries Mertens open the scoring for the hosts in the game, but Antoine Griezmann’s equaliser gave Barca a vital away goal.
Barcelona and Napoli will play their second leg at the Camp Nou on August 7 or 8, the date is still yet to be confirmed by UEFA.