On 12 July 2014, he fought and lost to Tomoki Kameda via technical knockout in round 7 for WBO Bantamweight World Champion at MGM Grand Las Vegas.
Sor Singyu has been a world champion for the two times on August 7, 2015, with a win against Ryo Akaho Japanese boxer by KO in second round at Ratchaburi Province.
[3] Both fighters traded knockdowns, but Tapales was the one who had the final say in the 11th round, sending Singyu to the canvas, who was not even close to beating the count.
[4] On 6 September 2020, Sor Singyu fought compatriot Campee Phayom for the WBA Asia super featherweight title.
Phayom was boxing well, until the seventh round, when the experienced Singyu knocked him out cold with a powerful punch combination to finish the bout.