The Northern Ireland defender's loss of form this season was exposed again on Tuesday, when he was at fault for two goals as the holders lost 4-0 at Upton Park.
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Evans, who was later replaced by Wes Brown, is now likely to be taken out of the firing line to rebuild his confidence after Ferguson returned to United yesterday and expressed his anger at the players he believes let him down.
The United manager's mood would have been worse had he not stayed overnight in London after the game, because the team only got back to Old Trafford at 4am on Wednesday morning after a five-hour trip.
United left Upton Park an hour after the quarter-final to catch a flight from Stansted to Manchester but the plane was diverted to Liverpool and then Leeds. They then had to wait an hour for the team coach.
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Explore more:People: Alex Ferguson, Wes Brown Places: Liverpool, Leeds, Manchester, London, Northern Ireland