Barcelona continued their poor run in La Liga as they were held to a 3-3 draw away at Celta Vigo.
They let a three-goal lead slip as Iago Aspas scored a 96th-minute equalizer.
The Blaugrana raced to a three-goal advantage before half-time with goals from Ansu Fati, Sergio Busquets and Memphis Depay.
But Celta Vigo responded with two goals from talisman Iago Aspas and a goal from Nolito.
Sergi Barjuan, caretaker coach of Barcelona, went in with the same team that secured the mid-week win at Dynamo Kyiv.
Celta Vigo made 5 changes to the side that drew against Rayo Vallecano with Iago Aspas and Nolito returning to the starting line-up.
Barcelona (Starting-lineup) : Ter Stegen; Mingueza, García, Lenglet, Alba; Nico, Busquets, De Jong; Gavi, Memphis, Fati
Celta Vigo (Starting-lineup) : Dituro; Mallo, Aidoo, Murillo, Galán; Tapia, Solari, Denis, Nolito; Galhardo, Aspas
FIRST HALF - Barca dominate Celta Vigo to gain a three-goal advantage
Barcelona produced a scintillating performance in the first 45 minutes, creating chances for fun. But the first real opportunity went to Celta Vigo as Iago Aspas struck wide after being 1v1 with Ter Stegen. But Barca made no such mistake as Ansu Fati, the match-winner against Dynamo Kyiv, scored with a curling strike to establish an early lead.
Sergio Busquets, who hardly ever scores, found the bottom-right corner with a well-placed finish to double Barcelona's lead. The Blaugrana dominated the midfield with excellent displays from De Jong and Busquets.
Barca added a third in the 35th minute with Memphis Depay heading in a cross from Jordi Alba. They should have added a fourth too but Ansu Fati couldn't slot in a cut-back from De Jong.
The only concern for Barca in the first half was a hamstring injury to Ansu Fati, who had to be taken off in the 46th minute. He was later spotted getting off the team bus on crutches as Barcelona made their way home from the match in Vigo.
SECOND HALF - Aspas inspires Celta Vigo's comeback
The tables turned completely in the second half as Celta increased the pressure. Galhardo thought he had reduced the deficit after he was put through by Denis Suarez. The celebrations were short-lived as VAR rightly ruled out the goal for off-side. Celta's pressure finally paid off as Iago Aspas latched on to a clearance from Araujo to give Celta hope.
Celta then had a penalty appeal turned down after Gonzalez nudged the back of Galhardo. The hosts had another goal chalked off after Nolito's volley found the back of the net. The goal was disallowed due to a handball from Nolito.
Celta got their second goal from Nolito who made no mistake this time, scoring from a low diving header. Frenkie de Jong then hit the crossbar as Barca tried to catch Celta out with a swift counter-attack.
It looked like Barca would escape with a victory. ButAspas then scored a 96th-minute equalizer with a brilliant finish from the edge of the 18-yard box.
It was a body blow for Barcelona as they are now winless in their last 4 games in La Liga and currently sit in 9th in the table. The teams now go into the international break and when they return Barcelona have a Catalan derby to look forward to while Celta Vigo takes on Villareal.