Borussia Monchengladbach captain Lars Stindl missed a penalty as the team's losing streak stretched to six games across all competitions at Augsburg after a 3-1 defeat in the Bundesliga on Friday.
Gladbach have lost every game since the club announced coach Marco Rose will be joining league rivals Borussia Dortmund next season, and the latest defeat will strengthen fans' calls to let him go.
Stindl's penalty miss was the visitors' biggest chance in a first half they dominated.
Substitute Ruben Vargas headed Augsburg ahead off a corner kick in the 52nd minute, and Marco Richter and Andre Hahn were on target late after Florian Neuhaus' temporary equaliser for Gladbach in the 68th.
The visitors were punished for being wasteful, with Neuhaus, Markus Thuram and Valentino Lazaro failing to score before Stindl hit a penalty wide left after Thuram was brought down in the 38th.
Gladbach had two more big chances right after Neuhaus' goal but Matthias Ginter headed wide and Rafal Giekewicz saved well from Neuhaus.
Instead, Richter smashed home in the 76th and Hahn wrapped up matters by chipping over Yann Sommer on the counter in the 89th.
Gladbach are winless in seven Bundesliga games of which they have lost five, and the result leaves them in 10th - six points away from European berths.
"It was tough. We did a lot of things right and should have scored. I apologise for the penalty," Stindl told streaming portal DAZN. "The aim must be to win games again, and not looking at the table."
Augsburg, whose three attempts on target all went in on the night, are 10 points above the danger zone in 12th.
"We couldn't have complained trailing at half-time but we improved and absolutely deserved the three points. This win will give us a lot of strength," Richter said.
The 25th round continues Saturday and Sunday, with leaders Bayern Munich at mid-table Werder Bremen and second-placed RB Leipzig up against fourth-placed Eintracht Frankfurt.