David Wagner was left with a bitter taste after being sent to the stands for ‘over-celebrating’ Town’s last-gasp win.
Elias Kachunga scored a dramatic stoppage-time winner and Wagner sprinted off to celebrate with his players.
Referee Peter Bankes sent him to the stands for the last few seconds as Wagner’s emotions got the better of him.
Wagner said: “It is an emotional game and I lost control of my emotions. But I didn’t shout at anyone, or hurt anybody, but it is a rule that I must not leave my technical area. I have seen the referee and he will put that in his report.”
Wagner also spoke of his “anger” at critics after back-to-back defeats against Sheffield Wednesday and Preston.
“I am angry that after two defeats I have to answer questions about the character of my players,” he said.
“At Huddersfield we are humble, we know where we come from. Eleven months ago, I came here and I lost my first two games and we were in a relegation battle.
“Now we under-perform in one game against Preston and people question us. I am angry when I read that we need a new striker. That is not correct.
“If we had drawn, I would have been happy. We are Huddersfield Town and we are a long-term project. We have won nine from 14 and have under-performed once.”
Kachunga scored in the third minute of stoppage time when he headed home Harry Bunn’s cross.
Before then Scott Carson had pulled off great saves from Nahki Wells and Bunn.
Huddersfield Town: Ward, Smith, Hefele, Schindler, Lowe, Whitehead (Mooy 61), Hogg, Kachunga, Palmer, van La Parra (Bunn 61), Wells (Payne 75). Unused substitutes: Hudson, Holmes-Dennis, Cranie, Murphy.
Derby County: Carson, Christie, Keogh, Pearce, Olsson, Hughes, Johnson, Butterfield, Ince (Weimann 90), Vydra (Bent 71), Russell (Anya 59). Unused substitutes: Baird, Hanson, Rawson, Mitchell.
Referee: P Bankes (Merseyside).
Man of the match: Elias Kachunga.