Alexander Zverev moved into his third straight Australian Open semifinal on Tuesday, halting the breakthrough run of American youngster Learner Tien with a victory under the closed roof of Rod Laver Arena.
The German reached his 10th Grand Slam semifinal at the 25th seed’s expense 6-3, 6-7(5), 6-1, 7-6(3) to set a high-profile clash against either world No.1 Carlos Alcaraz or Australia’s Alex de Minaur.
The world No. 3 leaned heavily on his serve to secure a win, firing 24 aces and saving all three break points he faced, each with unreturned deliveries. One of those clutch serves came at 5-6 in the fourth set, denying Tien a chance to force a decider. Zverev also controlled the short exchanges, winning 106 of the 0–4 shot rallies compared to Tien’s 68.