Young shuttlers Sourabh Verma and RMV Gurusai Datt have reached the quarterfinals of the men's singles in the Indian Open Super Series badminton tournament. In the second round of the event at the Siri Fort Complex in New Delhi on Thursday, while Sourabh recorded an upset win over seventh seed Kenichi Tago in three games 21-19, 18-21 21-11, Gurusai sent Yuhan Tan of Belgium packing to a 21-13 14-21 21-13 defeat. However, India number one P Kashyap found the going tough against world number two Taufik Hidayat and lost 21-17 21-19. In the quarterfinals, Sourabh will take on the winner between world number one Lee Chong Wei of Malaysia and Hyun Il Lee of Korea, while Gurusai will clash with eighth seed Yun Hu of Hong Kong. In the women's doubles, eighth seeds Jwala Gutta and Ashwini Ponnappa lost a gruelling battle 20-22 18-21 to Eei Hui Chin and Pei Tty Wong of Malaysia. In another match of the women's doubles, top seeds Miyuki Maeda and Satoko Suetsuna of Japan beat Pradnya Gadre and Jyotshna Polavarapu 21-8 21-16. In mixed doubles, fifth seeds Peng Soon Chan and Liu Ying Goh of Malaysia defeated Akshay Dewalkar and Pradnya Gadre 21-18 22-24 21-12 in a hard-fought battle; while seventh seeds Muhammad Rijal and Debby Susanto of Indondesia proved too good for Pranav Chopra and Prajakta Sawant as the Indian pair lost 11-21 21-19 13-21 in another thrilling match. Top seeds Kien Keat Koo and Boon Heong Tan of Malaysia beat Attri Manu and Jishnu Sanyal 21-9 21-14, while eighth seeds Rupesh Kumar and Sanave Thomas lost 19-21 12-21 to Yohanes Rendy Sugiarto and Afiat Yuris Wirawan of Indonesia in men's doubles.