Edin Terzic called Borussia Dortmund’s 3-3 draw with Stuttgart “brutally disappointing” as they missed the chance to move level with Bayern Munich at the Bundesliga summit.
The Black and Yellow looked on course to join Bayern at the top of the table when Gio Reyna struck in second-half injury time at Mercedes-Benz Arena.
But a 97th-minute equaliser from Silas Katompa Mvumpa instead saw them drop two crucial points in the title race against their 10-men hosts.
It is the latest capitulation of a topsy-turvy season for Dortmund, and Terzic did not hold back in his scathing assessment of their performance after the final whistle.
“We missed a huge chance as a team,” he told Sky Sport Germany. “That is brutally disappointing.
“It is hard for me to find the words [to explain] why it happened.
“We thought that with the loss at home to Werder Bremen, we had already experienced the worst part of the season.
“But this tops it again. We were lucky in the early stages. If we are honest, we almost conceded four goals against a team that was outnumbered.”
Dortmund held a man advantage for an hour of the game, after Stuttgart defender Konstantinos Mavropanos was dismissed for a second yellow card in the first half.
Their inability to capitalise on Bayern’s own slip-up, after a home draw with Hoffenheim, leaves them trailing the Bavarian giants by two points in the Bundesliga title race with six games to play.
Dortmund next host Eintracht Frankfurt on Saturday.