Atletico Madrid delivered a major boost to their hopes of winning the La Liga on Saturday by beating Barcelona 1-0 after over 10 years of loss to the Catalonia club.
AllNews understands that this is Diego Simeone's first league win against Barcelona as the manager of Atletico Madrid consigning Barcelona to the worst league start in 29 years.
Yannick Carrasco finished brilliantly from range after mistakes from Gerard Pique and Marc-Andre ter Stegen left the goal gaping but Barca, and a below-par Lionel Messi, failed to respond at the Wanda Metropolitano.
Instead, Atletico recorded their first league victory over Barcelona in 10 years, which puts them three points ahead of Real Madrid, with a game in hand, and second on the table, level on points with early leaders Real Sociedad.
It also leaves their opponents languishing in the 10th, with Barcelona's 11 points from their first eight games their worst tally at this stage since the 1991-92 season.
"Like any coach, I am responsible," said coach Ronald Koeman. "We know we have to improve the results. I continue to trust the players I have."
Real Madrid had earlier been held to a 1-1 draw by in-form Villarreal, another slip-up for the reigning champions to enforce the sense that this could be Atletico's year.
It also extends Atletico's unbeaten run in the league to 24 matches.
Another disappointing day for Barca was soured further by the sight of Pique hobbling off in tears with what looked like a knee injury.
Pique was hurt during a collision with Angel Correa and was in distress as he departed.
"I am worried," said Koeman.
"A lot of damage has been done."
Antoine Griezmann almost put Barca in front against his old club while Marcos Llorente went closest for Atletico, skimming the crossbar after a neat exchange between Kieran Trippier and Correa down the right.
Messi might have scored but was uncharacteristically hesitant, with an even half about to finish goalless until two errors gifted Atletico the lead.
Pique was caught out of position after a heavy touch and Mario Hermoso did well to free Carrasco. Ter Stegen, already upfield, rushed out to fill the gap Pique had left but Carrasco's first touch feathered the ball through the goalkeeper's legs before a curling finish from 50 yards sent the ball into the open net.
Clement Lenglet, with a chance to equalise, headed Messi's cross straight at Jan Oblak yet Barcelona was far from dominant while Messi struggled for his usual influence.
Philippe Coutinho came on and Pique hobbled off. Messi floated a free-kick wide and saw a shot blocked before substitute Martin Braithwaite was given a late chance after a poor kick by Oblak. But Barca was unable to find a way through.