Rooney key if United to break Bridge hoodoo

There are so many imponderables before Chelsea’s encounter with Manchester United at Stamford Bridge.

Will Rio Ferdinand and Ashley Cole shake hands? Will Ferdinand meet the suspended John Terry? Will football, after what seems like endless angst and acrimony, finally move on from the dramas and traumas of the past 12 months? There are even more questions on the field.

Will United boss Alex Ferguson persist in experimenting with his new diamond formation?