BEIJING: Seventh seed Alison Riske went out of the Tianjin Open in the second round on Wednesday, leaving only four of the original top eight still in contention at the $500,000 WTA event. American Riske was eliminated 6-3, 6-3 by Timea Babos of Hungary, ranked 74 in the world. Her exit followed first-round departures by Flavia Pennetta, Ukrainian Elina Svitolina and Zheng Saisai. But Czech third seed Karolina Pliskova qualified for the quarter-finals by beating Poland’s Magda Linette 6-2, 6-1. Fifth seed Kristina Mladenovic of France, the world No 27, also went through 6-4, 6-4 against Linette’s compatriot Urszula Radwanska.