Borussia Dortmund coach Jurgen Klopp has admitted that he was not pleased with his side's victory over Werder Bremen on Friday.
The defending German champions began the 2012-13 Bundesliga campaign with a narrow 2-1 win at home, thanks to goals from Marco Reus and Mario Gotze.
"I was pleased with some things, but dissatisfied with others," he explained to ARD.
"We have had no real match for over three months, which is why I'm pleased."
Dortmund's next game in the Bundesliga is against Nurnberg on Saturday, September 1.
