Dortmund have won back-to-back league crowns during the last two seasons, and Klopp knows the supporters' expectancy is growing ahead of the 2012/13 campaign.

"We have to put everything that has happened in the past aside. We have won the title like this twice - there is no chance that the third time will be easy," he told Bild.

"The problem is that it is easy to improve when you have been performing poorly previously. But now the bar is set extremely high for myself and my team."

Nevertheless, Klopp feels his players are still hungry for more success and will come out firing at the start of the new season.

"My motivation and enthusiasm is extremely strong, which is replicated by the team. There is now a spirit of optimism here," he said.

Dortmund begin their Bundesliga title defence at home to Werder Bremen on August 24.