But Chelsea and United could be left feeling especially embarrassed after several of their current and former players helped play a key role in the comeback.

Julian Brandt had equalised the tie with the second leg's opener, before Chelsea loanee Ian Maatsen gave Dortmund their first lead of the evening with a smart and low effort before half-time. The Dutchman cut into the box from left-back and powered his shot past Jan Oblak to spark wild scenes inside Dortmund.

Maatsen's parent club have had plenty of issues at left-back throughout the campaign, with Ben Chilwell and Marc Cucurella suffering with fitness and form, but Maatsen was instead used in a more advanced position and then loaned out to a team into the Champions League semi-finals.

Watch all the Premier League and Champions League drama unfold on TNT Sports

Similarly, United loaned out Jadon Sancho after he fell out with boss Erik ten Hag in August. He combined often with Maatsen down the left flank and was a threat across both legs, putting himself firmly in the shop window as Sir Jim Ratcliffe's team are open to letting him leave permanently in the summer.

However, a former United midfielder Marcel Sabitzer got the all-important goal after he returned to Germany following a short spell at Old Trafford last year.

The Red Devils decided against signing him permanently after a few months in the Premier League on loan from Bayern Munich. Their reluctance allowed Dortmund to snap him up, before the Austrian went on to score the winning goal while United watched at home following a catastrophic group stage.

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