In the early summer, I was practicing my serve (with a motion that later turned out to be quite destructive), and suddenly I felt a pop in my shoulder that sent pain surging throughout my arm. After lots of physical therapy and rest periods, the pain after playing persisted for months. I underwent an MRI, and my orthopedist discovered a cartilage defect in my shoulder joint. He said that this was a very strange injury for me, a tennis player. He said that this kind of injury could not have been caused by tennis, but a direct blow to my shoulder. In any event, the defect had to be repaired with surgery, as it could not heal by itself, and could develop shoulder arthritis. I received an arthroscopic operation called a microfracture. This technique creates small holes in the cartilage defect, which bleed, and form a blood clot. The blood clot will eventually become durable cartilage, which will allow my arm to function normally again, if all goes well. My doctor has said that I should be able to play tennis again. So far, my arm is feeling looser, but I still feel a little cracking in the shoulder every once in a while. I'm assuming this is normal, as the cartilage is still healing. In a few weeks, I will begin physical therapy again to rebuild my shoulder's strength post-surgery, and after that is completed, I will try playing tennis again. Does anybody have any advice for me?