Union incredibly claimed another win on Matchday 10, as Janik Haberer's brace was enough to defeat Dortmund and extend their lead in the Bundesliga table to four points.
After their 2-0 home win over Dortmund on Sunday, Fischer was at a loss for words when speaking to DAZN after the game:
"Madness, madness, madness! What else can I say?"
Fischer also noted that, "I think we had phases in the second half in which we had to suffer." But then he acknowledged, "The table is a nice sight."
Union play Heidenheim at home in the DFB-Pokal on Wednesday before traveling to Bochum on Sunday.