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.

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.

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

Teenage qualifier Learner Tien's Australian Open fairytale ended on Monday as Italy's Lorenzo Sonego blasted into his first Grand Slam quarterfinal 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.

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.

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

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

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.

An intriguing clash awaits as American teenager Learner Tien faces Italy’s Lorenzo Sonego in the Australian ... main draw and stunning No. 5 seed Daniil Medvedev in a marathon match.

Novak Djokovic isn’t the only Australian Open competitor dismayed by the commentary from broadcasters at this year’s tournament. American Ben Shelton expressed disgust “with how players have been treated by the broadcasters this week,