Professor Lucas Lepri teaches how to counter a single leg and take the opponent down. The opponent goes for the single leg with the collar grip. Once the opponent goes for the collar grip, Lucas immediately grips the bottom sleeve and reaches over the back to grip the Gi. He steps to the side and drops to the mat, pulling the opponent to the side using his leg to flip him over. Once on the mat, Lucas makes sure to get the under hook. From here, he can go to the knee on belly or spin around to get the armbar.