To effectively handle an opponent who frequently uses lobs, it's crucial to anticipate the trajectory of the ball and position yourself accordingly. Stay alert and ready to move quickly, as lobs can catch you off guard if you’re not prepared. When they lob, try to retreat and set up your footing for an aggressive overhead smash or a powerful volley to regain control of the point. Additionally, consider adjusting your own positioning closer to the net to apply pressure, forcing them into more predictable shots. Practicing your footwork and overhead technique will also enhance your ability to counter their lobs effectively.