Barca set new La Liga record
The leaders, fresh from a shock Champions League exit to Roma, led when Philippe Coutinho played in Luis Suarez to beat Neto at his near post.
They looked comfortable when Samuel Umtiti headed in Coutinho’s corner.
But the visitors gave them a late scare when Dani Parejo’s penalty squirmed underneath Marc-Andre ter Stegen after Ousmane Dembele fouled Andreas Pereira.
Ter Stegen was at the centre of the game’s other dramatic moment – when he gifted the ball to Valencia’s Carlos Soler but then brilliantly saved Rodrigo’s shot onto the crossbar.
Barca, who are now six results from the first unbeaten 38-game La Liga season, only need seven more points to seal the Spanish title.
They face Sevilla in the Copa del Rey final next weekend as they seek a domestic double.
The previous unbeaten La Liga record was Real Sociedad’s 38 across 1978-79 and 1979-80.
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