Coco Gauff defeated Zheng Qinwen 3-6, 6-4, 7-6 on Saturday in the WTA Finals in Riyadh, Saudi Arabia. The 20-year-old American earned $4.805 million in prize money for the title. It is the biggest payout ever for a women’s tennis event, topping the $4.42 million Ashleigh Barty earned during the 2019 WTA Finals in Shenzhen, …