Félix Auger-Aliassime defeated Dominic Thiem 6–3, 7–5, 6–7, 5–7, 6–3 in the first round of the Australian Open on hard court, confirming his status as pre-match favourite. Thiem mounted a spirited challenge in the third and fourth sets, forcing a fifth-set decider after trailing two sets to one, but Auger-Aliassime ultimately prevailed to secure a commanding opening victory. The Canadian's early-round success at the year's first Grand Slam reinforces his position among the tournament's contenders heading into the second round.