Learner Tien defeated Marcos Giron 7–6, 4–6, 3–6, 7–6, 6–2 in the first round of the Australian Open on hard court, confirming his status as pre-match favourite with odds of 1.52. Despite dropping the middle two sets to the American, Tien recovered decisively in the fourth-set tiebreak and dominated the fifth to secure a five-set victory. The result extends Tien's Australian Open campaign into the second round, where he will face a new opponent.