Schalke defender Matija Nastasic could be out of action for six months with an Achilles injury.
Nastasic has been forced to undergo surgery on an Achilles injury after suffering the injury in the 3-0 victory over Werder Bremen on Saturday.
— FC Schalke 04 (@s04_en) August 15, 2015
Reports suggest Nastasic could be out of action for six months.
Nastasic joined Schalke from Manchester City on a permanent deal this summer.