Gio Reyna to miss 'weeks' after sustaining groin injury on USMNT duty
The oft-injured midfielder is set to face another spell on the sidelines after playing a limited role in Dortmund's season
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- Reyna will be out for "a few weeks"
- Returned from USMNT duty before pair of friendlies
- Played just 10 minutes for Dortmund this season