Michy Batshuayi is in "great pain" with an injury sustained in the derby defeat to Schalke, Borussia Dortmund coach Peter Stoger has confirmed.
Batshuayi was carried off on a stretcher towards the end of Dortmund's 2-0 loss to Ruhr rivals Schalke in the Bundesliga on Sunday.
The Belgium striker - who has hit seven league goals since joining on loan from Chelsea in January - covered his face with his hands as he left the field.
And Stoger, while unwilling to offer a diagnosis for Batshuayi's apparent ankle injury, accepted it could be a serious blow for the forward, who was seen leaving the stadium on crutches and was reportedly taken to hospital.