Borussia Dortmund utility man Kevin Grosskreutz believes his side's current slump is simply down to the spate of injuries affecting the squad.

Jurgen Klopp has been without Mats Hummels, Marco Reus, Jakub Blaszczykowski, Ilkay Gundogan and Nuri Sahin for much of the season, with BVB well down the Bundesliga table in 13th place.

Their recent run of poor results has included shock defeats to Hamburg and Mainz among four losses from their opening seven games, but Grosskreutz is confident they will perform better once their stars are back to full fitness.

"It's not only because many injured players are still to come back. We all swore to each other that now we will start to show our style of football again," he told reporters.

"We will start doing so on Saturday."

Grosskreutz acknowledged that his team have made mistakes so far this season but insists the players have been hard at work on the training ground to rectify them.

"The training sessions have been very good. We are all in a good mood," he said.

"We analysed our mistakes and now we can finally start showing our game, the game of Borussia Dortmund.

"We made too many mistakes. Our pressing was bad in the Bundesliga. We just didn't show good football recently. That has to be better in future and we have to stop making mistakes."