Professor Lucas Lepri shows how to counter a single leg. Lucas and the opponent start standing, the opponent shoots for a single leg and Lucas immediately sprawls. One arm slides in over the shoulder and the other under the armpit connecting under the opponent. Lucas pulls the opponent’s arm in and then slides his opposite side knee to the side of the arm to pin it. Lucas now pulls the opponent back and uses his leg to block the opponent. From here, Lucas finishes the submission.