Borussia Dortmund coach Jurgen Klopp has admitted that he is expecting to have to break down a stubborn Werder Bremen defence in the clash on Friday night.

Klopp's side took 74 minutes to break the deadlock in the 2-1 win against Eintracht Braunschweig and he said that his players must also be wary of the counter-attack threat of Werder.

"We got a bit of practice for that type of game against Eintracht Braunschweig," Bundesliga.com quotes Klopp as saying. It's up to us to find solutions.

"Bremen can strike at any point of the match. They're a side with a lot of potential just waiting to be set free."

Bremen and Dortmund are two of the five sides to have taken six points from six to start the new season.