Tokyo Open: Liu books spot in last quarter finals, defeating Mertens

American Claire Liu won against Belgian Elise Mertens 6-4, 6-1 to reach the last eight of the Tokyo Open at the Ariake Coliseum and Ariake Tennis Forest Park on Wednesday. Liu, ranked No 84, will face Chinese Qinwen Zheng next. Ahead of her victory, the 22-year-old American defeated No 7 seed Alison Riske-Amritraj (6-2, 6-3). Mertens, ranked No 44, beat Chinese Qi