Well into the early hours of the morning in Melbourne, Daniil Medvedev has been dumped out of the Australian Open as Learner Tien became the teacher in seeing off the three-time finalist in a deciding set epic.

Fifth seed Daniil Medvedev is out of the Australian Open after losing a five-set thriller to teenager Learner Tien in the biggest upset of the tournament so far.

Teenage qualifier Learner Tien's Australian Open fairytale ended on Monday as Italy's Lorenzo Sonego blasted into his first Grand Slam quarter-final on his 26th attempt.

Against the World No. 55, Tien wilted on a hot and humid day in Melbourne, succumbing 6-3, 6-2, 3-6, 6-2 with a right thigh problem not helping.

Learner Tien has stunned the tennis world, claiming an upset victory over Daniil Medvedev at the Australian Open.

Tien, 19, become youngest American man to reach the Australian Open's third round since Pete Sampras did so aged 18 in 1990. Read more at straitstimes.com.

Raducanu set up a clash with Iga Swiatek but battled through more injury worries in her win over Amanda Anisimova

Roared on by Brazilian fans decked out in yellow, Fonseca appeared totally unfazed as he set up a second-round meeting with Italy's Lorenzo Sonego

Here is everything you need to know about Learner Tien vs. Lorenzo Sonego, including TV and streaming options for the match.

Martina Navratilova fully stood behind Ben Shelton's harsh criticism of Australian Open broadcasters as the tennis legend highlights that certain interviewers must level up their game. After beating Lorenzo Sonego to make the semifinal at Melbourne Park, the American tennis star had something he wanted to publicly say.

Andrey Rublev has opened up about seeking Daniil Medvedev's advice on managing his emotions after watching his compatriot successfully overcome those issues.