Bayern Munich's Arjen Robben cannot explain club's early season struggles

Bayern Munich winger Arjen Robben has said there isn't a "single reason" for the German champions' struggles this season.

On Tuesday, the Bavarians edged past fourth-tier club Rodinghausen with a 2-1 win in the German Cup. Bayern took an early 2-0 lead, but conceded after half-time, leading to a nervy finish.

This was their fourth win in a row, but this run has come on the of a four-match winless streak -- which included 3-0 loss at home to Borussia Monchengladbach -- and saw them slip down the Bundesliga table.

Their recent turnaround helped them climb back up to second, but they have been far from convincing; and Robben is at a loss when trying to understand why Bayern have found the start to this campaign so much more difficult.

"There isn't a single reason why we are struggling a bit right now," Robben told Amazon Music. "We tackle every match with a lot of seriousness. And we must be self-critical, but also remain calm.

"There were times when things were easier. We players also feel that right now and it's no shame to admit that in our current situation."

This weekend, Bayern host Freiburg before travelling to the Westfalenstadion to face Bundesliga leaders Borussia Dortmund on Nov. 10.