On Saturday evening, the Red Devils of the Premier League will face the Red Devils of the Blue Square Premier and most of the country will be hoping to see Crawley Town pull off an almighty upset at Old Trafford.

The non-league team have already beaten Swindon Town, Derby County and Torquay United en route to the last sixteen and Sir Alex Ferguson is wary of the challenge that they pose.

“They talk about the FA Cup dying, but it won’t die as long as you’ve got giantkilling acts that Crawley have already produced,” said Ferguson.

“And every manager will tell you, you don’t want to be a casualty.

“We lost to Leeds last season and it wasn’t easy to take. They were up for it and made it a cup tie.

“We will see the same tomorrow. Crawley will get stuck into us, there’s no other way for them. That is the way they are.”

Ferguson admitted that his team are expecting a tough time of things as the Scot looks to rest to his star players for the forthcoming match against Marseille in the Champions League.

“We expect a tough game. They’re very committed and aggressive and it’ll be a tough game.

“It will be brilliant for the Crawley fans but their team’s performances against Derby, Swindon and Torquay tell you they deserve to be in this round.”