There are question marks surrounding the involvement of three players – Roman Bürki, Christian Pulisic and Sokratis – ahead of the 151st Ruhr derby. They will all undergo performance tests this afternoon.

"We have another training session later today where we have to test several players," explained coach Peter Bosz in reference to the aforementioned trio. Sokratis sustained a rib injury in Stuttgart a week ago, while Pulisic was forced to miss that match with muscular problems and Bürki was involved in a collision with an opposition player on Tuesday.

The quartet of Marco Reus, Lukasz Piszczek, Sebastian Rode and Erik Durm are still unavailable. (br)