A disallowed Southampton goal

Manolo Gabbiadini converted a shorter cross in to the box ten minutes in, but referee Andre Marriner eliminated the effort on account of an offside call in the linesman.

Gabbiadini

However, replays suggested it absolutely was Ryan Bertrand who has been in an offside position, not Gabbiadini - and the full-back was inactive and not interfering with play, raising doubts about how correct the decision was.

Below 10-20 minutes later, Zlatan Ibrahimovic opened the scoring for Jose Mourinho's men having a rifled free kick from around 35 yards out.

Twitter users were quick to pour scorn about the officials' decision-making at Wembley.

Jesse Lingard then put United in to a 2-0 lead before half time, capping a remarkable passing move using a composed finish inside the far post, before Gabbiadini pulled two back for Saints to give the score to 2-2.

But Ibrahimovic headed home the winner with just a few minutes left on the clock within the second half, ending Southampton's cup dreams - and making the offside goal in early stages a lot more bitter.