Midfielder Kamal Issah got substituted early in Genclerbirligi's 3-0 defeat to Alanyaspor in the Turkish Super Lig on Saturday due to injury.
Issah collided wih an opposing player and suffered a waist injury which ended his game in the 24th minute.
The 24-year-old had to be replaced by Aleksandar Scekic.
Issah will undergo tests on Sunday to ascertain the degree of the injury.