Olympic silver medallist P V Sindhu progressed to the semifinals of women's singles but it was curtains for Sameer Verma in men's singles event at Korea Open Super Series, in Seoul today. Sindhu, who had won the silver at the World Championship last month, recovered from a mid-game slump to stave off the challenge from World No. 19 Minatsu Mitani of Japan 21-19, 16-21, 21-10.Sindhu will next face either third seed Sung Ji Hyun or China's He Bingjiao. Early this morning, Sameer once again tried to get across the Korean but top seed Son Wan dished out a gritty performance to beat the Indian 20-22, 21-10, 21-13.The Indian duo Satwiksairaj Rankireddy and Chirag Shetty will play their quarter final match later today.