Reus, who signed a new long-term contract with Dortmund last month, had to be helped from the field in the first half of the last 16 tie due to an apparent injury to his left knee.
The 25-year-old has been plagued by injuries in recent times and was forced to miss Germany's 2014 World Cup success after tearing ligaments in his left ankle.
Thank you for reading 5 articles this month* Join now for unlimited access
Enjoy your first month for just £1 / $1 / €1
*Read 5 free articles per month without a subscription
Join now for unlimited access
Try first month for just £1 / $1 / €1
MOST READ
