Tso started by looking very good and for two rounds it did look like Tso was going to have his own way with the Thai who was brought into the fight with around a weeks notice. Unfortunately for Tso the Thai fighter wasn't just here to make up the numbers and in round 3 Ratchasak managed to twice drop Tso who looked like he was unable to take the power of the Thai.
Ratchasak continued to have success in round 4, the most competitive round of the fight, though soon afterwards Tso rediscovered his rhythm and began to use his fast feet, fast hands and sharper punches which helped him put the 10-7 round behind him and re-establish control of the bout.
Although often in control of the action Tso was dragged into some really exciting exchanges, especially in round 10 as both let there hands go to start the final round, By then though it seemed Ratchasak was too tired to really unload on Tso like he did in round 3.
Having reached the final bell there was only one winner and with scores of 97-91, 97-91, 96-92 Tso maintained his unbeaten record though was given a scare.
For those wondering about Tso's toughest bout that was his controversial victory over Ratchasak's compatriot Rusalee Samor, a bout we felt Tso was very lucky to win.
Tso's victory on the card followed opening round blow out victories for IK Yang (15-0-0-1, 10) and Kuok Kun Ng (4-0, 2) earlier on the same card.