BEIJING–Iga Swiatek beat 18-year-old Iva Jovic, 6-1, 6-3, 3, Wednesday, and reached the quarterfinals of the China Open. No. 8-seeded Swiatek broke Jovic’s serve twice in the last four games to win in one hour and 35 minutes and advance against Elise Mertens of Belgium. READ: China Open: Swiatek, Zheng survive three-set tests in third