Brighton boss Roberto De Zerbi told BBC Radio Sussex's Johnny Cantor: "I think we played a very good game, we played with personality, with courage, we dominated the game. We controlled the game in terms of shots, possession.
"We made two important mistakes for the first two goals. We showed not the right experience to play this game but we are in progress. I am really proud for the performance and the attitude and the passion.
"It’s too easy to be proud when you win in Old Trafford. We have to explain the game, we have to analyse the game. Every day we can learn, the most important is to understand the mistakes but to keep the confidence.
"[It was] the first game in the Europa league for many players and we played very well. We can be not happy because we lost the game, but we have to be honest."
On missing Lewis Dunk's leadership as well as defensive qualities: "For sure, Dunk is not easy playing without him. It was difficult to play without [Evan] Ferguson too but Igor [Julio] played very well. JP [Joao Pedro] played a good game and we have to forget this defeat and to focus on Bournemouth."
On whether Dunk and Ferguson could be fit in time to face Bournemouth: "I think yes, but we will see tomorrow and Saturday better."