Despite the Tigers ending United's 17-game unbeaten run in all competitions, Jose Mourinho's men progressed to the final courtesy of a 3-2 aggregate victory.
Paul Pogba netted United's crucial goal, his seventh strike this season, to ensure United booked a trip to Wembley.
Manchester United player ratings against Hull in EFL Cup semi-final second leg
Thu, January 26, 2017
Express Sport brings you Manchester United's player ratings from their EFL Cup semi-final second leg clash with Hull
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David De Gea – 5.9
Paul Pogba delivered a "very average" performance, says Phil Neville
I thought like the rest of the Man Utd players he [Pogba] was very average
But Neville believes the £89m summer signing was far from his best.
"I thought like the rest of the Man Utd players he was very average," Neville told Sky Sports.
"It was a poor performance from the whole team and there wasn't a standout player.
Paul Pogba netted in United's 2-1 defeat to Hull
Jose Mourinho's men will face Southampton in the EFL Cup final
"He's going in the right direction and he could finish the season with 12 or 13 goals, which is not a bad return in his first season."
United will now play Southampton in the final on February 26 after they beat Liverpool 2-0 on aggregate in the other semi-final.