2015 Australian U/21 Snooker Runner-up
Undefeated in the round robin stage, winning 4 matches and dropping only 2 frames. Arthur won his quarter-final match against Adam Bleumink (VIC), 4-1. In the semi-final, Arthur beat Vijay Randall (QLD) by a 5-3 scoreline, and in the final, he lost to Victorian compatriot Ryan Thomerson 6-1. Arthur made the highest break of the tournament, a 106.