Yahoo Sports reports: THE ALL ENGLAND CLUB, London — It was just one match. It was on the most rarefied court in professional tennis, against a young player still figuring out who she is, because that’s what 20-year-olds like Maya Joint are doing at this stage of their lives. It was Serena Williams’ first competitive singles match in nearly four years. All of that makes Tuesday night on Centre Court an imperfect environment in which to render a judgment on whether the sport has evolved too far beyond where it was for