Arnott will compete in the semi-finals of the T47 100m at the IPC European Athletics Championships in Grosseto, Italy.
The competition started on Saturday and 19-year-old Arnott has had to wait patiently for his chance to get on the track for Great Britain.
Arnott, who has limited movement in his left shoulder due to Erbs Palsy, is a T46 athlete but has to run against T47 competitors in Grosseto, which is how it will be at this summer’s Paralympics in Rio.
He is drawn in the same semi as the number one ranked runner, Michal Derus of Poland, who has a personal best of 10.72 seconds, and Russia’s Alesksei Kotlov, who has a PB of 11.25.
World Under-23 200m champion Arnott’s best for the 100m is 11.36 seconds (11.22 wind assisted) and if he can run somewhere close to that then he should reach Wednesday evening’s final. He is the fastest ranked T46 competitor.
The top runners in the first semi-final are Russia’s Vadim Trunov (11.05) and Cyprus’ Anderis Aresti (11.09).