Siraj represents Fighter Centre, has a 8-2 pro record and comes from a first-round TKO win against Patrik Pietilä at FCR 16 in June. In his first KSW fight back in January, he took a loss against Lukasz Rajewski.
Abdulkadirov has a 9-1 record and will make his promotional debut in October. He rides a six fight winning streak, with five victories coming by stoppage.
KSW 87 will take place at Werk Arena in Trinec, Czech Republic. The card is headlined by a heavyweight bout between Michal Martinek vs. Darko Stosic.