[2] On December 8, 2019, Petchsila traveled to Japan to compete for the vacant WPMF World Light Flyweight title at the Battle Of Muaythai SEASON II vol.6 event.
[5] On March 12, 2021, Petchsila faced an established Thai champion for the first time when he met Praewprao PetchyindeeAcademy at Rangsit Stadium.
Petchsila overcame the pre-fight odds and defeated the former Rajadamnern Stadium champion by decision in a fierce bout.
[6] On September 30, Petchsila was matched with the #1 ranked fighter in the division and reigning WMO World Champion Satanmuanglek PetchyindeeAcademy at a Petchyindee promotion event in the Buriram Province.
Petchsila won via fourth-round knockout with an elbow strike and was announced as one of the favorites to win the Fighter of the Year award.