Patrice Evra knows Manchester United must focus for 90 minutes if they are to end their nine-year wait for a win at Chelsea on Wednesday.
Evra is among the majority of United players who head into the Champions League quarter-final first-leg clash having never beaten the Londoners on their own ground.
Sir Alex Ferguson's men have come close on numerous occasions and in recent times have headed north nursing a major sense of frustration.
They are totally out focus!