Ivica Olic hit an injury-time winner to give Bayern Munich the advantage after the first leg of the Champions League quarter-final with Manchester United.
United took the lead after only 66 seconds when Wayne Rooney volleyed in six yards out from Nani's free-kick.
But Franck Ribery's deflected free-kick set up a dramatic finale, rounded off by Olic's cool run and finish after a defensive error by Patrice Evra.
United's misery was made complete when Rooney limped off with an ankle injury.
The England striker appeared in severe pain after turning over on his right leg in the build-up to Bayern's winner.
United will hope the injury is not too serious, as they face a crucial Premier League match against on Chelsea on Saturday as well as the return match with Bayern next week.
It had started so well for United - and Rooney - but the visitors allowed Bayern to take control of a tie which is delicately balanced ahead of the second leg at Old Trafford on 7 April.
Sir Alex Ferguson's side will comfort themselves in the knowledge that they have an away goal, but the defeat marked their first in 16 unbeaten European away matches and leaves them with plenty to do, particularly should Rooney be missing in a week's time and Bayern be boosted by the return of winger Arjen Robben after a calf problem.
Much of the talk had centred on that pair before the game, but while Robben had to watch from the stands due to injury, Rooney took no time at all to make his mark on the tie.
With barely more than a minute on the clock Nani's free-kick from the right looped off the head of Mark van Bommel and, as Martin Demichelis slipped in the box, Rooney - in acres of space - volleyed home left-footed.
It was exactly the start United boss Ferguson wanted, especially after he had admitted beforehand that he would take a goal over a clean sheet from the tie in Germany.
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Source: BBC Sports
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