Messi and Neymar lead the way in a difficult clash.
The comeback hangover brings Barça's first loss in the league since October.
Ter Stegen, Umtiti and Messi star as Barça grabs an unlikely win out of the jaws of defeat.
Barcelona travel to Madrid on Sunday afternoon knowing a win will see them go top of La Liga for a few hours at least with Real Madrid not playing until later on Sunday.
Messi saves the day with a last minute penalty in a match to forget.
Barça needs to find life after the debacle vs PSG as Leganés visits the Camp Nou.
Disaster hits as Barça are mauled in Paris in an atrocious performance.
Barça's assault at Alavés home concludes with a superb thrashing.
The clubs make a rehearsal for the Spanish Cup final, a league match that Barça can't afford to drop points.
Barça aims to capitalize on the win at the Calderón as Simeone's men visit the Camp Nou seeking to turn the tie around.
Barça faces Valverde for the tenth time in the last two seasons.
Barça draws away from home in a lacklustre display by most players.