I am more worried about their players. They have some very good players who could improve a lot of clubs. Juve don't have the money or attraction to get players like Gundogan, Reus, Subotic, Lewandowski. These players could improve ManUtd or Arsenal a lot or even Madrid. I much rather they stay at Dortmund and for that Dortmund must be strong financially and sportingwise. I have no love for Dortmund nor do I see them as big threat as ManUtd or Arsenal.