Borussia Dortmund coach Lucien Favre was left shaking his head after they slumped to a shock 2-0 loss at Augsburg on Saturday, with the Bundesliga title hopefuls having as much as 80%possession at times but failing to score.
Dortmund were a shadow of the team that cruised past Borussia Moenchengladbach 3-0 in their opener last week with an impressive attacking display.
On Saturday, however, they bungled their dress rehearsal ahead of next week's German Super Cup against league champions Bayern Munich, who travel to Hoffenheim on Sunday.
Apart from the opening 25 minutes, which saw some good Dortmund combinations, the Ruhr valley club struggled to find space and lacked accuracy with their final passes.
"We still have a lot of work to do," Favre told reporters. "I am very disappointed. It is difficult to accept this defeat.
"We almost completely dominated the game, had almost 80% possession, but sometimes that does not get you much."
Augsburg struck either side of the break through Felix Uduokhai and Daniel Caligiuri and never really gave the visitors an opening to come back into the match.
"We started well but were not precise enough, we were too hasty," said Favre, who is in his third season at Dortmund.
"Augsburg defended really well. We need to be more patient to tire them out over the wings - then we would have had more chances through the centre. We are very sad."