Watch the WSOF 31 Preliminary Card tonight at 6 p.m. ET/3 p.m. PT

WSOF 31 will take place tonight from the Foxwoods Resort Casino in Mashantucket, Connecticut and the main card on NBCSN will be headlined by a title fight as Blagoy Ivanov defends the heavyweight title against Josh Copeland.

Prior to the start of the main card, the online preliminary card will begin at 7 p.m. ET/4 p.m. PT and will feature a heavyweight bout between Lorenzo Hood and Tyler King.