Learner Tien produced a dominant upset over Daniil Medvedev in the Australian Open round of 16 on hard court, winning 6-4, 6-0, 6-3 on 25 January 2026. Despite Medvedev's status as the pre-match favourite at odds of 1.43, the American emerged with a commanding performance, particularly in the second set where he conceded no games. Tien's clinical execution and consistency throughout the match proved too much for the Russian, who struggled to find rhythm and solutions across all three sets. The decisive nature of the victory—especially the bagel in the second set—underscored the gulf in form on the day. This result marks a significant breakthrough for Tien at Grand Slam level, eliminating a former top-three player and advancing to the quarterfinals.