John Millman defeated Alessandro Giannessi 6–3, 6–4 in the first qualifying round of the Australian Open on hard court on 10 January 2024. Millman's composed performance in the early rounds of the tournament's qualifying draw secured a straightforward two-set victory, with both sets decided by a three-game margin. The Australian's efficiency allowed him to progress without extended rallies or significant resistance from his Italian opponent. Millman's progress through qualifying kept alive his chances of reaching the main draw at Melbourne Park.