Arturo Vidal scored a scruffy late winner since La Liga leaders Barcelona came from behind to beat bottom club Leganes.
While Barcelona toiled in response Leganes is put by youssef En-Nesyris stunning attack forward.
The champions improved after the break and Luis Suarez equalised using a header.
Vidals end set the leaders three points clear of rivals Real Madrid, that play Real Sociedad (20:00 GMT).
The midfielders goal was fortuitous, Ousmane Dembeles corner deflecting liberally off Ruben Perez and falling.
Barcelona have lost three times this year and appeared nervy deservedly falling behind when En-Nesyri chose out the top corner with a shot after 11 minutes.
Oscar Rodriguez should have doubled the home sides lead but found the side-netting because their visitors struggled to get going in the last third.
Following half-time, Barca centre-back Gerard Pique hit the post but theyll be relieved to have escaped from this fixture with all three points.
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