A stunning upset unfolded at the Australian Open on Sunday when Learner Tien, the 25th seed from the United States, ousted higher-ranked Daniil Medvedev 6-4, 6-0, 6-3 in the fourth round. The victory propels Tien into uncharted territory: his maiden Grand Slam quarterfinal.

Medvedev, ranked 11th globally, started competitively in the first set but quickly unraveled. Tien’s blistering form saw him bagel the Russian in the second frame, then hold firm amid a third-set push. The American’s ferocious returns neutralized Medvedev’s game, while the Russian’s serve stats painted a grim picture—six aces overshadowed by poor hold percentages.

The entire encounter wrapped in under 70 minutes, with Tien dictating terms throughout. For Medvedev, it’s a harsh reminder of vulnerabilities exposed early in the Slam season.

Tien’s reward? A quarterfinal showdown with Alexander Zverev, the world No. 3 eyeing semifinals.

Meanwhile, Australia’s Alex de Minaur kept the Rod Laver Arena buzzing. The No. 6 seed crushed Alexander Bublik 6-4, 6-1, 6-1, securing back-to-back quarterfinal appearances. De Minaur’s pressure on Bublik’s serve was unrelenting, paving the way for an epic battle against world No. 1 Carlos Alcaraz.