Double Olympic medallist PV Sindhu faltered on her return to action after a long injury lay-off but in-form HS Prannoy continued his sensational run to progress to the second round of the Malaysia Open Super 1000 badminton tournament here on Wednesday.

Sindhu, seeded sixth, who was playing her first match since she sustained a stress fracture on her left ankle en route to her Commonwealth Games gold in August, lost 12- 21, 10-21, 15-21 to Rio Olympics champion Carolina Marin of Spain in 59 minutes.

Earlier, world No. 8 Prannoy lived up to his new status of being India’s best-ranked men’s singles player with a come-from-behind 22-24, 21- 12, 21-18 victory over Lakshya Sen, ranked 10th.

The 30-year-old will next face Indonesia’s Chico Aura Dwi Wardoyo.

World No. 5 doubles duo Satwiksairaj Rankireddy and Chirag Shetty also advanced to the pre-quarter finals with a 21-16, 21-13 win over the Korean pair of Choi Sol Gyu and Kim Won Ho.