Zheng Saisai, the unseeded 25-year-old out of China currently ranked No. 47 in the world, marched through four of the top eight seeds, including No. 2 Aryna Sabalenka in the final 6-3, 7-6(3) , to win her maiden WTA singles title at the 2019 Mubadala Silicon Valley Classic. She becomes the first Chinese singles champion in San Jose.