The 19-year-old who was a late qualifier to the Grand Slam secured the biggest win of his young career on Thursday

Learner Tien has become the youngest American man to reach the Australian Open’s third round since Pete Sampras in 1990

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.

Defending champion Jannik Sinner’s consecutive-sets streak has ended in the second round of the Australian Open.

Defending champ Jannik Sinner drops set for first time since October, but rallies for win; American Danielle Collins plays villain while advancing.

Jannik Sinner has announced that he will part ways with his coach Darren Cahill at the end of the season. The Australian, who joined Sinner's team in July 2022, will conclude the 2025 campaign before stepping back from full-time tennis.

UVA tennis alum Danielle Collins taunted the Australian Open crowd after defeating Aussie native Destanee Aiava in the second round.

Every person that’s bought a ticket to come out here and heckle me or do what they do, it’s all going towards the Danielle Collins Fund.”

Danielle Collins has gotten into a back-and-forth with a booing crowd at the Australian Open after eliminating a local player

“The AO is something that connects really well with New Balance because the mix of sport and culture they have is incredible,” Evan Zeder, New Balance director of global sports marketing for tennis, tells me. “I think the AO is a perfect mix and it is just a big party.”

Highlights of the fifth day of the Australian Open on Thursday (all times GMT): 1554 TEENAGER TIEN STUNS MEDVEDEV American qualifier Learner Tien held his nerve in a battle that lasted four hours and 49 minutes to stun Russian fifth seed Daniil Medvedev,

Australian Open is showcasing a crop of young men's players who are better equipped for the changes in tennis than their elders.