Learner Tien pulled off a massive upset against Daniil Medvedev at the Australian Open. So, who is Tien, the 19-year-old out of California?

American teen Learner Tien pulled off the biggest upset so far at the 2025 Australian Open, ousting Russian Daniil Medvedev -- the No. 5 player in the world -- in a 4-hour, 49-minute thriller at Margaret Court Arena.

When they resumed, Medvedev broke and served for the victory at 6-5 ... So now I just focus on tennis.” Emma Navarro, a U.S. Open semifinalist last year and seeded in the top eight for the first time at a major, was in trouble after two service breaks ...

No. 5 Daniil Medvedev, 6-3, 7-6 (4), 6-7 (8), 1-6 ... Iva Jovic, 6-0, 6-3 No. 8 Emma Navarro def. Wang Xiyu, 6-3, 3-6, 6-4 No. 9 Daria Kasatkina def. Wang Yafan, 6-2, 6-0 No. 10 Danielle Collins ...

MELBOURNE — Last year's runner-up Daniil Medvedev smashed his racquet and avoided a huge shock at the Australian Open on Tuesday before joining a rampant Taylor Fritz and veteran Gael Monfils in the second round. Three Chinese women courted success as Wang Yafan, Wang Xiyu and Zhang Shuai, won at Melbourne Park on Tuesday.

There are six American men and five American women in the third round. Tommy Paul, Coco Gauff and Jessica Pegula all play Thursday. No. 17 Frances Tiafoe, a two-time U.S. Open semifinalist, was upset by Hungary’s Fábián Marozsán in five sets in the second round.

Iga Swiatek rushed through her first set in 26 minutes and completed her 6-0, 6-2 second-round win over Rebecca Sramkova in an hour at the Australian Open.

Teenage qualifier Learner Tien stunned last year's Australian Open runner-up Daniil Medvedev in an epic match ending ... raced past American wildcard Iva Jovic in straight sets. Emma Navarro, the eighth seed from the United States, will face Ons Jabeur ...

Brazilian teenager Joao Fonseca stunned ninth seed Andrey Rublev in a major Australian Open shock on Tuesday as racquet-smashing 2024 finalist Daniil Medvedev narrowly ... emphatic winners on day three, with Emma Navarro and Emma Raducanu also victorious.

When they resumed, Medvedev broke and served for the victory ... So now I just focus on tennis.” Emma Navarro, a U.S. Open semifinalist last year and seeded in the top eight for the first ...

American Learner Tien upset No. 5 seeded Daniil Medvedev 6-3, 7-6 (4), 6-7 (8), 1-6, 7-6 (10-7) at the 2025 Australian Open, in a 4-hour, 49-minute match that began Thursday night and ended early Frid

MELBOURNE, Australia — Australian Open women’s champion Madison Keys returned to her career-best ranking on Monday and joins three other American women in the WTA top 10, while men’s champion Jannik Sinner maintained his significant lead atop the ATP list.