[2] Ducos reached the final of the 400m hurdles at the 2017 European Youth Olympic Festival in Győr, Hungary.

[3] Ducos was a surprise winner of the French national indoor championships in 2022 over 400 metres.

[7] Ducos ran at the SEC Outdoor Championships in May 2024, and was times at 47.69 for the 400m hurdles but was disqualified for a lane infringement.

[8] He ran 48.64 to qualify for the final of the NCAA Outdoor Championships in Eugene, United States on 5 June 2024.

[10] In September 2024, it was announced that he had signed up for the inaugural season of the Michael Johnson founded Grand Slam Track.