The WTA Tour Finals in Saudi Arabia was never going to be an under-the-radar affair. Judy Murray, a top coach and the mother of Andy, the two-time Wimbledon champion, has been conducting clinics. There will be events focused on women’s health issues. A 5,000-seat stadium-within-a-stadium venue has been constructed at King Saud University. And Spain’s Garbine Muguruza, a two-time Grand Slam champion, former world No. 1 and boldface name in tennis, is tournament director. “She’s played the event,