Underground Jiu Jitsu opened Oct. 4 at 1406 Capital Ave., Ste. 108, Plano. The gym offers classes for adults and children focused on grappling, self-defense, fitness, discipline and confidence-building. Classes are led by world-class athlete Diego Santana Do Espírito Santo, who has won gold at all International Brazilian Jiu-Jitsu Federation Championships in Texas. The business's sister gym, Dallas Underground, is located next door and offers strength and conditioning classes. 214-505-3732. www.underground-bjj.com