In 2013, Chellamootoo competed in the
men's flyweight at the
World Taekwondo Championships in Puebla, Mexico. He was eliminated in his third match by
Damián Villa of Mexico. A year later, he won one of the bronze medals in the −58kg event at the
2014 European Taekwondo Championships held in Baku, Azerbaijan. Chellamootoo
represented France at the
2015 European Games in Baku, Azerbaijan in the
men's 58kg event without winning a medal. He was eliminated in his first match by Max Cater of Great Britain. The following year, he competed at the
2016 European Taekwondo Olympic Qualification Tournament hoping to qualify for the
2016 Summer Olympics in Rio de Janeiro, Brazil. He won his first match but he was then eliminated in his next match by
Ron Atias of Israel. In 2018, he competed in the
men's 68kg event at the
Mediterranean Games without winning a medal. He was eliminated from the competition in his second match, against
Hakan Reçber of Turkey. In 2019, Chellamootoo competed in the
men's bantamweight event at the
World Taekwondo Championships in Manchester, United Kingdom where he was eliminated in his first match by Korai Murakami of Japan. At the
2019 Military World Games held in Wuhan, China, he won the silver medal in the
–63kg event. Chellamootoo competed at the
2021 European Taekwondo Olympic Qualification Tournament held in Sofia, Bulgaria hoping to qualify for the
2020 Summer Olympics in Tokyo, Japan. ==Achievements==