India, May 30 -- India's PV Sindhu lacked the consistency required to trouble world number 1 An Se Young for sustained periods, going down in the quarterfinals but ace men's doubles pair of Satwiksairaj Rankireddy and Chirag Shetty moved into the semifinals with a hard-fought win at the Singapore Open Super 750 badminton tournament here on Friday.

The two-time Olympic medallist showed flashes of her attacking best and managed to put the Korean under pressure in phases, but An's superior control, movement and ability to win the crucial points ensured another comfortable 21-17 21-14 victory in their lopsided rivalry.

The loss extended Sindhu's winless run against the reigning Olympic champion to nine matches. Across those meetings, the In...