He competed for Great Britain in the
2021 European Athletics U20 Championships, where he reached the semi-finals of the
200 metres. He won the English national 100m title in 2022. He lowered his personal best for the 100 metres to 10.23 in April 2023 in
Walnut, California. He was selected for the
2023 European Athletics U23 Championships in
Espoo. After transferring to the
University of Houston, he began being coached by
Carl Lewis. In May 2024 he lowered his wind-legal personal best to 10.00 in
Fayetteville, Arkansas and then ran a wind-assisted 100 metres in 9.84 seconds to qualify for the 2024 NCAA Championship finals. Competing at the
2024 NCAA Division I Outdoor Track and Field Championships in
Eugene, Oregon he won the 100 metres title with a run of 9.95 seconds. He became the first European to win the title and placed him as the sixth fastest Briton of-all-time. On 29 June 2024, he won the 100 metres title at the
2024 British Athletics Championships in Manchester, his first national title, and the first sprinter to win the NCAA Division 1 and British titles in the same season. On 5 July 2024, he was selected to represent Great Britain at the
2024 Summer Olympics in the 100 metres as well as being included in the 4x100 metres relay squad. Hinchliffe went out in the 100 metres semi-finals at the Games in Paris despite breaking ten seconds twice and also beating eventual gold medalist winner
Noah Lyles in the first round, but ended the event as the highest ranked British athlete. Days later, he ran the final as Great Britain won a bronze medal in the 4x100 metres relay, his first senior medal. Following the Olympic Games in 2024, he made the decision to turn pro and left the University of Houston to be train under former Great Britain teammate
Richard Kilty. However, a stress fracture and hamstring injuries restricted his ability to race for large parts of 2025, and he has to overcome the loss of his father. On 2 August 2025, he ran 10.01 seconds to place third in the 100 metres at the
2025 UK Athletics Championships in Birmingham, behind
Zharnel Hughes and
Jeremiah Azu. In September 2025, he competed in the men's 4 x 100 metres at the
2025 World Championships in
Tokyo, Japan. In February 2026, Hinchcliffe completed a student-athlete reinstatement process and returned to the University of Houston to work under sprint coach Carl Lewis. ==Personal life==