Watch Jiu-Jitsu Phenom Grace Gundrum Roll With Jiu-Jitsu Legend Jean Jacques Machado
Grace Gundrum and Jean Jacques Machado are two jiu-jitsu black belts on separate ends of the spectrum. On one end, Gundrum is just 19-years old and holds the honor of the youngest-ever American female black belt. On the other end is Machado, a black belt competitor since the 1990s and
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