Jakarta: World champion P V Sindhu advanced to the second round of the Indonesia Master with a hard-fought victory over Japan's Aya Ohori but defending champion Saina Nehwal suffered a shock exit from the Super 500 tournament, here on Wednesday. It was also curtains for world championships bronze medallist B Sai Praneeth, Kidambi Srikanth and Sourabh Verma. The fifth seed Sindhu clawed back from a game down to notch up a 14-21 21-15 21-11 victory over Ohori.

Sindhu has never lost to the world No.20 Japanese in their 10 meetings so far. Ohori had lost to the Indian last week in the second round of the Malaysia Masters. The 24-year-old will take on Japan's Sayaka Takahashi, who defeated Saina, in the second round. Saina, who won this tournament last year before going through a lean patch, lost 21-19 13-21 5-21 to Takahashi in a gruelling 50-minute contest.