A friend of my son's just got sponsored by Wilson and got a few items from them including 2 racquets. My son plays with Head racquets and was wondering if they do any type of sponsorship program. What are the sponsorship programs like from different racquet companies? Do kids have to have a certain ranking? Is it usually initiated by their coach or local pro? This is a great opportunity for my son to practice his skills in making phone calls and in communicating so I'd love to get some advice. thx