The reigning U.S. Open women’s champion’s contract with Under Armour, which has had her as an athlete for seven years, expired and the Eager Beavertons outbid Under Dog, Adidas and Uniqlo. In addition to 22-time Grand Slam champion Serena Williams, Stephens will join Madison Keys as one of the U.S.’s up and coming champions on the Nike roster. The third American in this year’s U.S. Open semi finals is Coco Vandeweghe, an Asics athlete, and the ... Log in to view full article.