Preston North End boss Darren Ferguson fancies upsetting
Chelsea in today's FA Cup
clash.
Ferguson will use dad Alex's FA Cup misery to try to inspire
Preston to a shock fourth-round triumph.
Ferguson admits his side's chances of beating Chelsea depend on the visitors having the sort of
off day his father's Manchester
United endured in their 1-0 home defeat by Leeds in
the last round.
He said: "Sometimes you get years when there are little flurries
of shock results.
"Those are the examples you need to look at. Leeds going to Old
Trafford and Reading going to Anfield and winning.
"It happens all the time in the FA Cup. It's why it grabs
everyone's emotions.
"Chelsea can't play well
every game. If we are at our maximum and they are not, we stand a
chance."