US Open: After her stunning Paris gold, Zheng Qinwen could be the one to watch in an open draw for the women's title

Women's tennis was the source of an unlikely gold medal that eventually proved crucial for China to stay level with the United States at the top of the medal table at the recently concluded Paris Olympics. Zheng Qinwen, the rising 21-year-old World No. 7, had been steadily improving on the tour, and reached her first Major final at Australian Open earlier this year. But few would have predicted her to win her country's first-ever singles Olympic gold this summer. And by doing so, she has become something of an overnight sensation back home. In what feels like an increasingly open…