Dhaka, Sept. 17 -- A two-goal lead at Old Trafford used to be about as close to a guarantee of victory as Manchester United could get.

Before Wednesday night, United had won 143 of the previous 145 home matches in which they went 2-0 ahead.

Against Brighton, it took them only 10 minutes to get there.

Shea Lacey scored on his full debut, Mason Mount added a second less than two minutes later and Michael Carrick's side appeared to have produced exactly the response they needed after defeat in the Manchester derby.

What followed was something United had not experienced at Old Trafford for 50 years.

Brighton scored three times without reply and won 3-2, knocking United out of the Carabao Cup and turning what should have been a position o...