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.

All-action Ben Shelton battled past stubborn Italian Lorenzo Sonego 6-4, 7-5, 4-6, 7-6 (7/4) on Wednesday to reach his first Australian Open semi-final.

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.

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

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.

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

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

Ben Shelton, the 21st seed, reached his first Australian Open semi-final with a 6-4, 7-5, 4-6, 7-6 win over Lorenzo Sonego in a thrilling match lasting 3 hours and 50 minutes. Shelton, known for his powerful serves,

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.