Manchester United fullback Ashley Young admits they weren't good enough for their Carabao Cup defeat to Derby County.

United were beaten 8-7 on penalties in a marathon shoot-out after the 90 minutes ended with Jose Mourinho and Frank Lampard's sides locked at 2-2.

“I am not sure we have done enough in the 90 minutes to manage to win the game," said the skipper.

"We have managed to dig deep and show character and take it to penalties but it just wasn't enough to win the game.

"At 1-0 we had chances to win the match and on a different day the ball goes in the back of the net and it is a different game.

“When you play teams from the lower divisions it is always going to be tough and they had more intensity than we did. Obviously when you are playing these games you have to show that intensity and go further than the opposition but we didn't do that and we got punished and they won the game.

“We showed that (intensity) when we started and went 1-0 ahead but you have got to build on that.

“When you don't take your chances you get punished. Derby are a good footballing team and they showed that.

"We showed character to get ourselves back into it and take the game to penalties but it is a lottery from there."