The 23-year-old striker suffered a heavy chest injury during a training session and immediate examination revealed a pneumothorax, reports Xinhua news agency.
"The loss hurts of course. As a team we will absorb his injury. I wish Davie a speedy recovery," Hertha Berlin coach Pal Dardai said.
According to the club's statement, Selke will be sidelined "for an indefinite period" and "definitely miss the season opener" against newly promoted Nuremberg on August 25.
"The injury annoys me incredibly. It really puts me off but I can't change it now. Injuries happen in professional football. I have to go through this now and come back as fast as I can," Selke told the club's official homepage.
(This story has not been edited by Social News XYZ staff and is auto-generated from a syndicated feed.)
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