Manchester United boss Sir Alex Ferguson admits they've lost Jonny Evans for a fortnight due to injury.
Evans was United's only fit central defender heading into the game and failed to reappear for the second half as Dimitar Berbatov bagged a hat-trick.
Ferguson revealed: "Jonny came off injured. He has a calf injury and will be out for two weeks.
"We have had a nightmare the last few days. Phil Jones and Chris Smalling have both been ill. Rio Ferdinand called off yesterday with a back injury and Jonny Evans has come off at half-time.
"It does put you under pressure."