The keeper was fortunate Costa headed wide as he failed to claim a corner and he did not inspire confidence throughout.
Did not get forward to help his side attack down the left often enough and regularly afforded Barragan too much space. His disappointing afternoon was compounded with a red card in the second half.
Looked complacent when called into action as the counterattack caused him problems. He failed to follow the run of Parejo as he slotted home the equaliser.
The right-back had a typically adventurous game, making a series of runs into the danger area. He was out jumped by Piatti for the Valencia second.
Put in a dynamic display as he looked to fill the gap left by Messi when the Argentine dropped deep. The interplay with his team-mates was solid but he did not create enough himself.
Struggled for positioning when Valencia broke at pace throughout the game. He made a couple of decent challenges but often found himself reacting to the movement of the opposition, rather than anticipating it.
Played some decent passes in the centre of the park early on but he began to grow short of original ideas as los Che packed men behind the ball.
Did not offer enough protection to the defence throughout the game. He was often very sloppy in possession and that enabled Valencia to attack the defence he was meant to be shielding.
The winger was not involved in the game enough, despite Barragan leaving plenty of space behind him at times. His link-up play was lacking and he really should have done more for his team.
Opened the scoring with an impressive effort from an acute angle. His movement was consistently impressive as he often ran into space beyond the defence, but he should have scored a second to put more distance between the two sides.
Assissted the opener with a decent cross for Sanchez at the back post. He saw a lot of the ball and flitted about dangerously before eventually scoring his first Liga goal since September from the penalty spot.
Made a number of impressive stops to thwart Barcelona time and again.
A brilliant performance in the heart of defence from the towering Frenchman. He was imposing and forceful at the back, putting in a number of crucial blocks.
The centre-back made a number of high-quality challenges in dangerous areas to repel the Blaugrana. Unfortunate to concede a penalty after the break.
Made plenty of runs down the right and helped keep Alba further away from goal than Barca would have liked.
Scored his side's opener on the break and helped his team defend for much of the game by dropping in alongside Romeu and Javi Fuego when not in possession.
Was a threat from the very first minute. Worked Valdes early on with an impressive shot and assisted Parejo for the opener and Alcacer for the third.
Screened the defence well when not in possession, reading the play well and positioning himself to break up the Barca attacks.
A solid perfomance from the left-back. He failed to track some of the runs from Dani Alves and Sanchez but when he was faced up with an opponent he gave a good account of himself.
Tracked the runners through the middle very well, communicating with the defence to ensure that no Barca man had a free run through the middle.
Caused the Barca defence no end of problems with his excellent movement and intelligent runs. His flick on was headed home by Piatti for the Valencia second before he swept home his side's third to win the game.
The diminutive Argentine stunned Camp Nou as he soared above Dani Alves to head home Valencia's second with a great finish.