Borussia Dortmund face a deepening injury crisis in the build-up to the new Bundesliga season with captain Marcel Schmelzer the latest to be sidelined.
The full-back suffered ligament damage in an ankle in Monday's training session in Guangzhou, a problem that was only fully diagnosed after the 29 year old's return to Germany.
Schmelzer is expected to be out for up to a month, meaning he could miss his club's return to Bundesliga action at Wolfsburg on 19 August.
The former Ajax boss, who took over from Thomas Tuchel this summer, has options though.
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