SALT LAKE CITY, March 5, 2014 /PRNewswire/ --  "Official Health Supplement Supplier of the WTA" has been a partner since 2006; will extend sponsorship through 2016 Eugenie Bouchard, Madison Keys, Monica Puig, Sloane Stephens, Samantha Stosur, Zheng Jie and Zhang Shuai sign on as brand ambassadors More than 160 WTA players use USANA products, including 14 of the Top 20 and 7 of the Top 10 The "Aces for Humanity" campaign will donate money to the USANA True Health Foundation for every ace served by WTA players at Premier WTA events throughout the year