Peter Bosz admitted he may be without Christian Pulisic, Sokratis and Roman Burki for Borussia Dortmund's crunch derby battle with Schalke on Saturday.
Pulisic has missed the last two Dortmund contests — losses to Stuttgart and Tottenham Hotspur — with a muscle injury. Meanwhile Sokratis was forced off against Stuttgart while Burki went down against Spurs with a head injury.
The American teenager returned to training Wednesday providing some hope he could feature for Bosz's struggling side but the manager admitted Friday the attacker is among those who will face fitness tests before the Schalke showdown.
"We still have a practice today and we need to test if Sokratis, Roman Bürki and Christian Pulisic can play," Bosz told media.