Taiwan's Hsieh Su-Wei has overpowered American qualifier Amanda Anisimova 6-2 6-2 to win the Japan Women's Open.
Second-seeded Hsieh on Sunday converted five of six break points against the 17-year-old Anisimova, who was playing in her first WTA final.
Anisimova, who turned 17 just two weeks ago, was the youngest player to reach a final since 16-year-old Donna Vekic at Tashkent in 2012 and Birmingham in 2013.
She lacked the poise that allowed her to reach Sunday's final, double-faulting five times and making 23 unforced errors.
Hsieh never faltered and finished with 14 winners to just six unforced errors to claim her third career title.
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