Check out the weekly rundown in the world of MMA, including reactions to a possible UFC-FBI team-up, the end of the line for Alexander Volkanovski, Tank vs. Roach controversy, and more.

Facing France’s Audrey Tcheumeo, Harrison kept her opponent at bay for nearly the entire round before springing her signature arm bar (or Ude-hishigi-juji-gatame) in the waning seconds to win ...