Pro Tip for CNN contributor Cari Champion: If you're going to criticize people who "don't really understand tennis," avoid making a glaring mistake of your own about the sport! Appearing on Monday's CNN This Morning, former ESPN host Champion was discussing the ongoing U.S. Open and commenting on how, in her opinion, women players get treated more harshly when it comes to bad behavior on the court, Champion ripped people who comment on the matter but "don't really understand tennis." But just moments later, Champion thrice alluded to Naomi Osaka as an "American" tennis player: You know what I'm excited...