A double-header with Sevilla will go some way to defining Barcelona's season and their forwards made sure they won the league meeting.
Liverpool are reportedly leading the race to prise Kylian Mbappe from Paris Saint-Germain.
Amid talk about Mohamed Salah's future, it seems Liverpool's focus is on Virgil van Dijk.
Barcelona needed extra time to beat Cornella after twice missing penalties, something Ronald Koeman said was unacceptable.
After missing two penalties in normal time, Barcelona eventually broke Cornella's resistance to reach the next round of the Copa del Rey.
Lionel Messi is recapturing his best form for Barcelona, according to Ronald Koeman.
Frenkie de Jong scored the only goal as Barcelona beat LaLiga strugglers Huesca 1-0 at El Alcoraz.
Ousmane Dembele cancelled out Kike Garcia's opener as Barcelona, who missed a penalty through Martin Braithwaite, were held by Eibar.
Barcelona boss Ronald Koeman has questioned why his side were made to play late on Saturday ahead of a Tuesday Champions League game.
Ousmane Dembele has been plagued by injuries during his time at Barcelona and is now set for another spell on the sidelines.