Hot topic in tennis: Coco Gauff stirred the pot at the United Cup by saying US fans are the "worst" at supporting their players abroad. Some took offense, but Serena’s former coach Rennae Stubbs jumped to Gauff’s defense, calling her one of the sport’s classiest acts. Gauff later clarified she just wants more passion from American fans at international events, not more money spent. Is she right to want more energy in the stands, or did she cross a line? #Sports #Tennis #CocoGauff