I have a friend who hits with me regularly and it frustrates me how he overestimates his abilities. He is a pretty weak player. He has terrible footwork, no depth on shots, and no leg drive on any of his shots. However when I asked him to self rate himself he said he was a 5.5. He thinks he could beat me easily which isn't true at all and he is just too arrogant about his pathetic game. How can I convince him how terrible his game really is?