Leeds United assistant manager Eddie Reiner explained Daniel Farke let his frustrations boil over because referee Peter Bankes did not add more time to his side's home game against Manchester City.
When the match hit 90 minutes it was announced that a minimum of six minutes would be added, but Farke was angry no more was put on top, and was red-carded at the final whistle for aggressively approaching the referee.
Antoine Semenyo's goal in first-half stoppage time made the difference, but Leeds had good chances before that, which Dominic Calvert-Lewin and Brenden Aaronson failed to take.
Farke's punishment meant he was unable to take the post-match press conference, and he will not be allowed on the bench for Tuesday's Premier League home game against Sunderland.
"We had six minutes' added a time and obviously if you're chasing the game, you're one down, you see the opposition team – it's what probably all the teams are doing – wasting time. You feel like, ‘Come on, you can add a few seconds more,’" explained Reinder. "I think we had also the feedback of the fourth (official that) it's going to be added.
"Then I think just about six minutes after that we get the ball for one delivery and then you're emotional, this is what the sport is all about, and you are not allowed to get this last ball in.
"Then I think he's gone on the pitch and asked why, so probably the explanation is going to be he was over-emotional how he's gone on the pitch, I would suggest.
FRUSTRATION: Leeds United manager Daniel Farke (Image: Justin Setterfield/Getty Images)placeholder image
FRUSTRATION: Leeds United manager Daniel Farke (Image: Justin Setterfield/Getty Images)
"It's disappointing and you would have wished for a more sensible action from the referee. Maybe you can give a yellow card, it's an emotional game."
Overall, though, Leeds were rightly pleased with their performance against a side pushing Arsenal for the title.
"I'm really proud of the boys, an unbelievable shift once again, unbelievable performance, created our chances, our moments," said Reiner.
"We're disappointed we didn't score.
CHANCES: Dominic Calvert-Lewin (Image: Oli SCARFF / AFP via Getty Images)placeholder image
CHANCES: Dominic Calvert-Lewin (Image: Oli SCARFF / AFP via Getty Images)
"I think we're playing one of the best teams in the world, we need to convert one of these chances.
"We restricted them to very few chances considering it's Man City.
"Man City, fair play to them, how they defend as a team, it's not just individuals, you see what a world-class team it is."
The timing of the goal was tough for Leeds to take having been the better team in the first half, but they did not let it affect them in the second.
"This one moment, the worst possible moment just before half-time, they (City) played it really well," acknowledged Reiner.
"We haven't been switched on in this one moment – well played (by City), good turnaround, good delivery, low ball, good finish, so also you can't always avoid it, but yeah, (it came at) the worst possible moment.
"I think we did a really good game, so (the half-time message was to) try to keep going, to push it, there are moments you need also to suffer to get our moments in the game. We pushed them all the way throughout the game."
Joe Rodon went off as Leeds chased the game, and his hamstring will be assessed ahead of the game against Sunderland. Leeds reported no other injuries.
Pep Guardiola's assessment of the game was that "they started really well, which we expected here at Elland Road.
"It's always so intense and after that we played a thousand million passes to make the vibe of the crowd a little bit more calm and let them run and run through our passes.
"But we needed a little bit more intention to play up front, to make more movements.
"When they got a little bit more fatigued, we start in the last 15-20 minutes (of the first half) to have the intention to pass the ball to try to score a goal.
"We found it in the first half.
"We didn't have a great match, but we didn't concede anything except the first 15 minutes.
"We defended really well and it was a huge victory for us."