Thomas Tuchel has rued Borussia Dortmund's lack of cutting edge after seeing his side slip to a 2-1 defeat at Hertha Berlin on Saturday.
The hosts took the lead through Salomon Kalou after 11 minutes before Pierre-Emerick Aubameyang brought BVB back into the game just after half time.
Dortmund then spurned a number of chances to take the lead and were made to pay when Marvin Plattenhardt's sumptuous free kick sent Die Alte Dame ahead in the 71st minute.
"We had two good opportunities to go ahead and then we gave them a goal," Tuchel said after the match. "Our lack of effectiveness cost us the three points.
"The same performance would have been sufficient here more often than not. The result is annoying, but the performance was okay."
Dortmund midfielder Andre Schurrle agreed with his boss, putting his hand up for the blame for one of the many chances that the visitors spurned.
"Small details decided the match today. The first was right at the start when I was through on goal and should've scored," Schurrle said.
"If I had done, the match would have been different and it would have been much easier for us.
"Then we concede a stupid goal, but that can happen. I'm not blaming anyone there.
"In the second half we were doing well and had a lot of opportunities to go maybe 2-1 or even 3-1 ahead. Then it would have been completely over.
"But unfortunately we didn't take our chances, one thing led to another and we were beaten by a top free kick. It's very annoying."
Hertha Berlin moved to fifth on the Bundesliga table with the win, three points behind third-placed Dortmund.