Borussia Dortmund midfielder Ilkay Gundogan refuses to rule out a move away.

Gundogan has been linked with Arsenal and Manchester United.

The German international added another year to his deal at the Westfalenstadion, tying him to BVB until 2017.

But he says that he remains keen on a new challenge at some point, although he remains happy at the Bundesliga giants.

"You can always see from two different perspectives: some will say, okay, he has extended, and if he should go next year, the club will therefore still get a lot of money. So it's all good," Gundogan told Kicker.

"And others say: Again, it's only one year.

"Everyone has to form his own opinion - I just want to be honest. I appreciate this wonderful club very much, but my life plan also looks at some time with a new challenge."