Atletico Madrid pulled level on points with the Catalans with a 1-0 victory of their own against Getafe earlier on, their 11th straight win across all competitions.
Leganes defender Sergio Gonzalez headed home from a corner after four minutes for the visiting minnows and Barcelona missed a host of presentable chances as they failed to mount a comeback.
After a superb start to the season, Barcelona have lost three of their last six league games and won just one of those, seeing their lead whittled away.
Hansi Flick's side lead third-place Real Madrid by a single point, after the champions drew at Rayo Vallecano on Saturday, having played one extra game than both their closest title rivals. "It was a messed-up game, it's impossible to be happy. I think we started the game half asleep," Pedri told DAZN.
"We woke up, we created chances but we didn't have the spark we needed to get the goal...
"We have to be better in front of goal if we want to win points, we're in a bad run in the league and we have to turn it around."
Barcelona started in the worst possible way as their former youth player Munir El Haddadi broke in down the right and forced a fine save from Inaki Pena at his near post.
From the resulting corner Leganes took the lead, with Sergio Gonzalez powering a header home to stun the Olympic stadium into silence.
This story is from the December 17, 2024 edition of Hindustan Times Ranchi.
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This story is from the December 17, 2024 edition of Hindustan Times Ranchi.
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