Brighton boss Roberto de Zerbi was left delighted with his players after their superb win at Chelsea.
Teen Julio Enciso struck the winner from 35 yards to earn the 2-1 triumph.
Substitute Danny Welbeck had levelled at Stamford Bridge after Conor Gallagher's deflected strike gave Chelsea a fortunate lead.
De Zerbi later said: "I am really pleased for the performance. We deserved to win for the quality of the performance. I'm lucky to be a coach of these players. I am honest when I tell you these words.
"Julio [Enciso] is another because we have a lot of important younger players. I'm happy for him. It is an important goal for us and for him. I think we could play better after the goal and we suffer too much. After the second goal we played too deep, but we work to improve.
"We are losing too many players [to injury]. We have a very tough last period of the season. The next game we will play the semi-final of the FA Cup and this is a problem for us. But we have very strong players and they can play the structure of the play.
"We have to organise to achieve our target in the best way.
"I'm happy for the result, I'm happy because we made our fans happy, our club happy. But for me, I am starting to think about the semi-final now. If you are happy too much for the result in the past, you can't do this in football."