To exploit an opponent's weakness in their backhand chop, focus on targeting the ball's placement and speed. Aim to consistently deliver deep, layered shots to their backhand side, particularly low and spinning balls that force them to stretch and adjust their stance. Mix in sudden short angles and varied shot speeds to disrupt their rhythm, creating opportunities for you to attack when they struggle to return the ball effectively. Additionally, incorporate deceptive shots that disguise your intentions, making it harder for them to anticipate and prepare for the next hit, ultimately putting them under pressure and forcing errors.