Barcelona's defence 'fragile' - Luis Enrique

Neither Suarez nor Messi started at home to Alaves on Saturday and although they came off the bench they were unable to prevent a shock 2-1 defeat for Barca.

As well as leaving out Messi and Suarez, Enrique changed his entire back four, whilst goalkeeper Jasper Cillessen and striker Paco Alcacer made their debuts.

Alaves' Ibai Gomez celebrates a goal against Barcelona at the Camp Nou Stadium, Barcelona, Saturday. Mathieu somehow then blasted wide from another set-piece before Barca's makeshift defence was caught out once more when Ibai Gomez slotted home the victor.

The decision backfired and Alaves, playing in the top flight for the first time in a decade, made the most of their few chances, frustrating the champions even after Suarez, Messi and Iniesta came on.

The Uruguay worldwide came off the bench to make his 100th appearance for Barcelona against Alaves on Saturday, and while he was unable to prevent their shock 2-1 defeat at the Nou Camp, he reached the milestone with an unrivalled record.

Brendan Rodgers has reinvigorated the Hoops since taking over from Ronny Deila in the summer - guiding the club to the Champions League group stage after a two-year absence and overseeing a 5-1 thumping of fierce local rivals Rangers on Saturday.

"I would be stupid if I didn't say Messi is the best for us, we have a lot of quality players but Leo makes us a different team".

"He is, by a distance, the best number nine in the world", he told Sky Sports.

"At the moment, things have not started well as we have lost". We are here to look to get a result.

And Iniesta insisted Barca will have licked their wounds and learned the lesson in time for the visit of the Scottish champions.

The sides often seem to attract each other in the competition as the season before Celtic achieved one of their most famous victories in recent times with a 2-1 home triumph over Barca. We contemplate all possibilities, they always press after losing the ball, they don't fall back.

"This defeat shows how hard it is to win games, and credit must go to this team because we've won everything in recent years".

Atletico Madrid are fifth on five points after beating Celta Vigo 4-0 to earn their first win of the season.

Fabinho added a third just after halftime with a thunderous finish and new signing Kamil Glik rounded off the rout in the 71st minute before Julian Palmieri volleyed in a late consolation goal for the host.

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