He won the gold medal in the men's 67 kg event at the 2021 European Karate Championships held in Poreč, Croatia.

Xenos won one of the bronze medals in the under-21 men's 67 kg event at the 2016 EKF Cadet, Junior and under-21 Championships held in Limassol, Cyprus.

[7][8] A month later, Xenos lost his bronze medal match in the men's 67 kg event at the World Karate Championships held in Dubai, United Arab Emirates.

[10][12] He won the bronze medal in the men's kumite 67 kg event at the 2022 World Games held in Birmingham, United States.

[13] Xenos won the silver medal in the men's 67 kg event at the 2023 European Karate Championships held in Guadalajara, Spain.