Berlin, Aug. 31 -- Borussia Dortmund midfielder Giannis Konstantelias faces several months on the sidelines after suffering a cruciate ligament tear in his left knee during his Bundesliga debut against Hamburg, the club announced.
The 23-year-old Greece international sustained the injury in a midfield challenge in the 52nd minute of Saturday's 2-0 victory and was forced to leave the pitch shortly afterwards.
The setback came after Konstantelias had made an immediate impact on his first league appearance for Dortmund, scoring his maiden goal for the club in first-half stoppage time.
Dortmund sporting chief Lars Ricken said the injury was a major blow after the new signing's promising start at the club.
"This news hits us very hard becaus...