They had started brightly, scoring through teenager Lewis Cook, who netted his first ever senior goal.
Unfortunately he followed it up with his maiden professional red card, Leeds soon conceded an equaliser, and they just failed to really get started again.
Uwe Rosler has given his post-match thoughts on the game, and believes they paid the price for a lack of composure after going 1-0 up. Leeds went onto draw the game 1-1 and lose 4-2 on penalties.
He said his side eased off, while Lewis Cook's youthful exuberance got the better of him.
Speaking to LUTV, he said: "We stopped a little bit instead of going to get the second one.
"We invited them a little bit without giving them chances, just making individual mistakes, at the back too.
"Lewis was very excited after scoring his first senior goal, too excited. After that it was very v difficult. I don't know how long we played with 10 men."
Rosler is learning about his side as much as they are getting used to him, but nonetheless the defeat was still a galling one as it saps the player's energy with no reward ahead of Sunday's clash away to Reading.