PETALING JAYA: Former international Tan Boon Heong proved that he’s still a force to be reckoned with.

The 31-year-old, who has joined forces with former Korean doubles ace Kim Sa-rang, stunned world No. 7 Fajar Alfian-Muhammad Rian Ardianto of Indonesia 21-13, 18-21, 21-12 in the first round of the Korean Masters in Gwangju, South Korea yesterday.