I'm in the process of selecting a new racket. As I peruse through online shops, I noticed that some of (what appear to be) second-tier line ups are claimed to be used by top pros. For example, Prince O3 White is advertised as Sharapova's racket. Assuming that sub $100 rackets lack technology, material or whatever that a manufacturer's $200 top-of-the-line products, what accounts for tour pros' choice of these second-line products? Were these rackets once a manufacturer's top models that have over the years become obsolete and less pricey? Or do pros after all not need the most expensive, most cutting-edge rackets after all by compensating with their skills?