Schalke general manager Horst Heldt has labelled the club's 2-1 defeat to Greuther Furth on Saturday as "humiliating" but has given his backing to under-fire boss Jens Keller.
Schalke's woeful form continued at the weekend with the last-minute loss to the Bundesliga strugglers, meaning they have picked up just one win in their last nine league games.
The defeat means the German club now sit sixth in the table and are seven points behind the Champions League spots.
"That was humiliating," Heldt said after the match. "We should have never allowed Furth to come back after taking the lead.
"You have to understand, I won't speak about our goals for the season. We had calculated on picking up those points but have not won them today. It was very important to bag those points."
The Royal Blues sacked Huub Stevens before the winter break, with Keller installed as his replacement.
But despite the Schalke boss struggling for results at the moment, Heldt insists he is fully behind the club's current manager.
"We hit this crisis before this game," Heldt said. "It will become even more unpleasant now. We all have to take responsibility for that. I will not act against my conviction. Jens does a good job. He will stay our coach until the end of the season."