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?

Daniil Medvedev earns code violation for racket abuse before rallying past wild card entrant; Taylor Fritz carries U.S. banner forward.

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.

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

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 ...

Russian Andrey Rublev, seeded ninth, was upset by qualifier Joao Fonseca, an 18-year-old from Brazil. He stormed into his Grand Slam main draw debut, stunning Rublev 7-6 (1), 6-3, 7-6 (5) in two hours and 23 minutes.

Three-time Australian Open finalist Daniil Medvedev smashed his racket ... Holger Rune was pushed all the way to five sets and Emma Navarro also had a tough time in one of three all-American ...

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.

14 (UPI) --Daniil Medvedev ripped 24 aces and converted ... No. 4 Jasmine Paolini of Italy, No. 7 Elena Rybakina of Kazakhstan, No. 8 Emma Navarro of the United States, No. 10 Daria Kasatkina ...

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.

The first Grand Slam of 2025 is done, and we learned a few things along the way. One is that Jannik Sinner is far and above the rest of the players on the ATP tour. OK, maybe we already knew that, but he re-enforced the thought.