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.

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

MELBOURNE, Jan 14 (Reuters) - Three-times Australian Open finalist Daniil Medvedev allowed his frustrations ... Danish 13th seed Holger Rune was pushed all the way to five sets and Emma Navarro also had a tough time in one of three all-American ties ...

Three-time losing finalist Daniil Medvedev and home favourite Alex de Minaur set out on the road to Australian Open glory Tuesday while Jasmine Paolini headlines the women's action. De Minaur, nicknamed "The Demon" by the Australian fans and media,

On day three in Melbourne, two Americans turned Rod Laver Arena into a nervous wreck, a 17- and 38-year-old stole the show, and Daniil Medvedev ... NCAA champions Emma Navarro and Peyton Stearns ...

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

Jasmine Paolini and Elena Rybakina, seeded fourth and sixth respectively both sailed through their Round 1 matches. Paolini defeated Chinese qualifier Sijia Wei 6-0, 6-4, while 2022 Wimbledon champ Rybakina took care of 17-year-old Emerson Jones 6-1, 6-1 in just 53 minutes. Rybakina will face yet another 17-year-old in Round 2, taking on Jovic.

Daniil Medvedev ripped 24 aces and converted six break points to outlast Kasidit Samrej in a 3-hour, 8-minute first-round victory Tuesday at the 2025 Australian Open. No. 9 Andrey Rublev was the latest upset victim.

The 2024 U.S. Open runner-up and No. 4 seed beat Cristian Garin 6-2, 6-1, 6-0 to move into a third-round match against 38-year-old Gael Monfils, who last week became the oldest player to win an ATP title.

Iga Swiatek has described her performance as perfect after a 6-1, 6-0 victory over Emma Raducanu at the Australian Open. Saturday's contest was the only matchup in the women's third round between two players who have won a Grand Slam title.

Iga Swiatek demolished Emma Raducanu on Saturday to sweep into the last 16 ... There will be intense interest in 19-year-old qualifier Tien, who stunned three-time runner-up Daniil Medvedev in a five-set epic. The youngster wolfed down a pepperoni pizza ...