Olympic silver medallist shuttler PV Sindhu eked out a hard-fought win over World No. 2 and defending champ Akane Yamaguchi in the opening match of the World Tour Finals here yesterday.

Sindhu, who had finished runner-up at the last edition in Dubai, dished out a superb game, mixed with patience and aggression, to defeat the Japanese 24-22, 21-15. However, Sameer Verma couldn't adjust to the pace of World No. 1 and world champ Kento Momota, going down 18-21 6-21 in the opening match.