Two-time Olympic medallist P V Sindhu advanced to the semi-finals of Malaysia Open after her opponent Akane Yamaguchi of Japan retired due to injury, while India’s ace men’s doubles pair of Satwiksairaj Rankireddy and Chirag Shetty bowed out of the Super 1000 badminton tournament in the quarter-finals here on Friday.

Pitted against third-seed Yamaguchi in the quarter-finals, Sindhu took the opening game 21-11 before the three-time world champion from Japan, who was wearing a knee brace, decided to pull out of the match.