Star Indian shuttler PV Sindhu roared back to form, defeating Indonesia’s Gregoria Mariska Tunjung in straight games in the opening round of the Indonesia Open World Tour Super 1000 event, here on Tuesday.

The two-time Olympic medallist and former world champion, who struggled with her form in the last two games where she made first round exits, took 38 minutes to prevail over her recent nemesis 21-19 21-15 and seal a pre-quarterfinal berth.