Vidic doubt for Barca

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Nemanja Vidic has emerged as a doubt for Wednesday's crucial first-leg of Manchester United's UEFA Champions League semi-final clash with Barcelona.

The Serbian stopper, who has been outstanding for United all season alongside Rio Ferdinand in the heart of the defence, missed training on Tuesday evening.

Reports claim that Vidic was rushed to hospital in Catalunya with a stomach complaint and had nothing to do with his recent knee injury.

Although not thought to be too serious, Vidic is now a doubt for the match and Sir Alex Ferguson could be facing a defensive headache.

Wes Brown, who has been an ever-present at right back all season, was forced to train away from the main group along with Darren Fletcher - although he should be okay.

Should Vidic fail to make the match then Brown could be switched to centre-half with captain Gary Neville an option to feature at right-back although John O'Shea could also fill in both positions.

Previous injury concerns Anderson, Owen Hargreaves, Wayne Rooney and Edwin van der Sar all trained without any problems at Camp Nou.