Jurgen Klopp has insisted that Borussia Dortmund's defence must not be used as a scapegoat for their mixed start to the campaign.
The reigning German champions have so far struggled to compete in the Bundesliga, picking up only one win in their last three games and conceding nine goals in the process.
But while Klopp is understandably concerned with the situation, he is adamant the goals that his side have shipped recently are not all down to their own defensive limitations.
"We recently have made some mistakes at the back," he told reporters. "Against Hamburg, there were individual errors, but there were also some brilliant attacks from our opponents.
"Against Leverkusen we defended really well and did not allow them many chances, so we know how to defend.“
Nevertheless, the former Mainz boss did accept that there is "something missing" from Dortmund's football this season, given their sudden inability to record clean sheets.
"You have to live with certain setbacks," he added. "We create a lot of goalscoring chances, but concede from almost every effort our opponent has [on target].
"We are missing something and we have watched ourselves on video to try to identify it. You can see from the five goals we scored that our attack works well. The problem is that we concede too much.“
The 45-year-old was then asked about whether he thought his team are obliged to score three goals every game in order to win, to which he jokingly responded: "Well, three goals are apparently not enough either.“