Barca, the only non-English side in the semis, have been poor in the league but gave a far more impressive performance against an out-of-sorts United.
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Barca took advantage of the confusion in the United ranks to put the visitors under heavy pressure with Deco driving forward from midfield and providing some good service for attacking trio Lionel Messi, Andres Iniesta and Samuel Eto'o.
Image: Barcelona's Lionel Messi challenges Park Ji-Sung of United