Sir Alex Ferguson has claimed Roman Abramovich is "obsessed" with winning the Champions League.
Chelsea have lost four semi-finals and also the 2008 final to Manchester United in Abramovich's so far vain pursuit of the ultimate club prize.
The Blues will have their dreams ended for another year on Tuesday night unless they can overturn a first-leg deficit in their quarter-final clash with United at Old Trafford.
If they do go out, many believe Carlo Ancelotti will get sacked in Abramovich`s relentless quest for European glory.
"It does seem to be an obsession with Chelsea to win the European Cup," said Ferguson. "That is why they signed Fernando Torres. The owner has every much nailed his colours to the mast in that respect. I have felt that for quite a while with him.
"To have an obsession of winning the European Cup is stretching yourself a wee bit. At the end of the day it is a very difficult competition to win."