Barcelona suffered a third home defeat in a row for the first time in a single season with a shock La Liga loss to Rayo Vallecano.
Barca’s defeat leaves Real Madrid on the brink of the title, with Carlo Ancelotti’s side needing one point from five games to become champions.
Madrid can clinch a record 35th Spanish title by avoiding defeat against Espanyol on Saturday.
Rayo earned a Liga double over Barca through Alvaro Garcia’s sharp strike.
Following defeats by Eintracht Frankfurt in the Europa League quarter-finals and Cadiz in La Liga on Monday, Barca have lost three successive home games for only the second time in their history.
The other occasion came at the end of the 1997-98 season and start of the 1998-99 season under Dutch boss Louis van Gaal.
Barca, who knew victory would all but secure a top-four finish and Champions League qualification, have won just twice in their past six matches.
Xavi’s side should still secure a top-four spot but his side’s form will be a concern for the legendary Barca midfielder, who took over from Ronaldo Koeman in October.
Koeman was sacked after Barca lost at Rayo and the Madrid side became only the fourth promoted side to complete a home and away double over Barcelona and the first since 1997-98.
Garcia’s movement allowed him to collect Isi Palazon’s superb pass ahead of Barcelona defender Sergino Dest and beat home keeper Marc-Andre ter Stegen at his near post with a low shot.
Barcelona dominated possession as they searched for an equaliser, with Gavi hitting the crossbar with a rising shot in the first half.
The home side continued to press in the second half and, having thrown on attackers Memphis Depay, Luuk de Jong and Adama Traore, created opportunities against a well-organized Rayo side.
But Barca paid the price for their profligacy.
Rayo keeper Stole Dimitrievski made several comfortable saves, while defender Alejandro Catena cleared a Dembele shot off the line, as Barca could not find a way through despite almost 14 minutes of stoppage time.
Line-ups
Barcelona
Formation 4-3-3
- oneTer Stegen
- twodestinationSubstituted forlengletat Four. Five’minutes
- 4Araujo
- 24GarciaSubstituted forI broughtat 71′minutes
- 18SunriseBooked at 90mins
- twenty-onede JongSubstituted forGonzalez Iglesiasat 60′minutes
- 5Busquets
- 30PaezBooked at 90mins
- 7DembeleBooked at 89mins
- 25aubameyangSubstituted forde Jongat 71′minutesBooked at 81mins
- 19towersSubstituted fordepayat 60′minutes
substitutes
- 3Pique
- 6Puig Marti
- 8Alves da Silva
- 9depay
- elevenI brought
- 12Braithwaite
- 13Murara Net
- 14Gonzalez Iglesias
- fifteenlenglet
- 17de Jong
- 22Mingueza
- 36you had
Vallecano Ray
Formation 4-2-3-1
- 13Dimitrievsky
- twentyBalliuBooked at 69mins
- twoMaras
- 5CatenaBooked at 90mins
- 33Garcia Torres
- 6ComesanaBooked at 37minsSubstituted forCissat 56′minutes
- 23ValentineSubstituted forTrejoat 67′minutesBooked at 90mins
- 7PalazonBooked at 85minsSubstituted forHernandezat 87′minutesBooked at 90mins
- 12LopezSubstituted forSuarezat 87′minutes
- 18Garcia Rivera
- 9NtekaSubstituted forGuardiola Navarroat 56′minutes
substitutes
- oneZidane
- 3Falcao
- 4Suarez
- 8Trejo
- 10Days Correia
- elevenSylla
- 16Guardiola Navarro
- 19Rodrigues
- twenty-oneCiss
- 32Hernandez
- Referee:
- Isidro Diaz de Mera Escuderos
- attendance:
- 57,023
LiveText
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Match ends, Barcelona 0, Rayo Vallecano 1.
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Second Half ends, Barcelona 0, Rayo Vallecano 1.
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Gavi (Barcelona) is shown the yellow card for a bad foul.
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Foul by Gavi (Barcelona).
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Álvaro García (Rayo Vallecano) wins a free kick on the left wing.
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Attempt blocked. Ousmane Dembélé (Barcelona) right footed shot from the center of the box is blocked.
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Alejandro Catena (Rayo Vallecano) is shown the yellow card for a bad foul.
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Adama Traoré (Barcelona) wins a free kick in the attacking half.
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Foul by Alejandro Catena (Rayo Vallecano).
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Attempt missed. Ousmane Dembélé (Barcelona) left footed shot from outside the box is high and wide to the left. Assisted by Sergio Busquets.
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Pathé Ciss (Rayo Vallecano) hits the left post with a left footed shot from outside the box. Assisted by Álvaro García.
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Attempt blocked. Adama Traoré (Barcelona) right footed shot from the center of the box is blocked. Assisted by Memphis Depay.
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Nico González (Barcelona) wins a free kick in the defensive half.
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Foul by Sergi Guardiola (Rayo Vallecano).
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Óscar Trejo (Rayo Vallecano) is shown the yellow card.
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Mario Hernández (Rayo Vallecano) is shown the yellow card.
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Memphis Depay (Barcelona) wins a free kick in the attacking half.
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Foul by Óscar Trejo (Rayo Vallecano).
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Jordi Alba (Barcelona) is shown the yellow card.
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Offsite, Barcelona. Jordi Alba tries a through ball, but Ousmane Dembélé is caught offside.
Reference-www.bbc.co.uk