"You can't expect a youth player like Aaron Anselmino, who's coming on loan from Chelsea, to suddenly make Dortmund's defence more stable", ex-Bayern Munich and Germany star Matthaus wrote in a column for Sky.
"Returning player Carney Chukwuemeka, in my opinion, has a high level of quality; I'm enthusiastic about this player. He's a great player for the midfield. I told Kehl personally: 'I'd love to see him in the Bundesliga'. But of course, Chukwuemeka won't be able to solve BVB's defensive problems. Once all the injured center-backs are back, Borussia will be very well positioned there as well."