BKFC 51 takes place Friday at Salem Civic Center in Salem, Va., as 20 bareknuckle fighters come together for 10 five-round scraps. Atop the card, BKFC women’s strawweight champion Britan Hart (7-1) aims to defend her title against undefeated challenger Melanie Shah (2-0). The main card streams on Fubo after prelims on MMA Junkie, beginning at 8 p.m. ET