Ole Gunnar Solskjaer knows better than most what dumping Liverpool out of the FA Cup can do to a team's confidence.Solskjaer bagged the winner for Manchester United in a fourth round victory over their bitter-rivals back in 1999 at Old Trafford.The rest, as we all know, is history.Sir Alex Ferguson's men went on to win the competition en-route to completing an iconic treble - an achievement no team has managed to emulate ever since.Solskjaer believes coming from behind to beat their arch enemies 22 years ago gave United a psychological boost to go on and re-write the record books.United will be hoping for the same result on Sunday when they host Jurgen Klopp's English champions in a crunch fourth round showdown.The fallen giants cannot go.
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