The Commonwealth Games silver medallist just missed out on picking up another memorable gong by 0.01 of a second.
Arnott ended up fourth in the T47 100m after a photo-finish ruled he had just lost out for the bronze medal to German Phil Grolla. Home favourite Grolla was given a time of 11.36 seconds, with Arnott clocking 11.37 seconds.
Arnott is a T46 athlete but at major events has to compete in the higher T47 category. He was only beaten by one fellow T46 competitor, Lithuanian Danas Sodaitis, who took second in 11.19.
The race was comprehensive won by Poland’s Michal Derus, who clocked a stunning 10.77 second.
Arnott still has another chance of a medal in the 200m. That will take place on Thursday. He his ranked fourth fastest in the field, but not all the athletes have run the distance this year.