Our players are mostly too slow to tackle. They get one lazy hand on a jumper at best most of the time, and look like they lack grip strength to hold on, those who do don't know how to use their bodies after that. Surely they do grapple training and body weight stuff to build grip strength...Rioli gets it, torques with his body weight twisting their hips and shoulders with his grip on the wrist and hip. Take the centre, standard Aikido and Judo and probably every other throwing and grappling martial art for controlling the opponent.