Jannik Sinner advanced to the Australian Open quarter-finals, overcoming illness, while Lorenzo Sonego ended Learner Tien's dream run. Madison Keys surprised Elena Rybakina, and Elina Svitolina uplifted Ukraine by defeating Veronika Kudermetova.

Boulter vs Kudermetova result as Raducanu issues update on injury after win - Raducanu set up a clash with Iga Swiatek but battled through more injury worries in her win over Amanda Anisimova

Day nine of the Australian Open saw Lorenzo Sonego and Elina Svitolina advance to the quarter-finals with impressive wins. Jannik Sinner overcame a medical timeout to beat Holger Rune, while Madison Keys stunned Elena Rybakina.

Jannik Sinner battled through illness to reach the quarter-finals of the Australian Open on Monday as his Italian compatriot Lorenzo Sonego ended teenager Learner Tien's fairytale run.

Follow live radio commentary of Katie Boulter in Australian Open second round - radio and live text later on Katie Boulter, Jannik Sinner and Daniil Medvedev.

The last of the Australian Open men's quarterfinals takes place in the wee hours of Wednesday morning, in the United States.

Iga Swiatek will look to continue her march to a maiden Australian Open title on Wednesday while Jannik Sinner's powers of recovery will be tested in a quarter-final against home hope Alex de Minaur.

Djokovic has been at the centre of controversy before at the Australian Open, notably in 2022 when he was deported on the eve of the tournament over his refusal to be vaccinated against Covid. He claimed ahead of this year’s tournament that he was “poisoned” by lead and mercury in his food while held in a hotel before being deported.

First came the medical timeouts, one each for Jannik Sinner and Holger Rune with the temperature above 90 degrees Fahrenheit at the Australian Open.

First came the medical timeouts, one each for Jannik Sinner and Holger Rune with the temperature above 90 degrees Fahrenheit (32 Celsius) at the Australian Open.

World No. 1 Jannik Sinner fought through blistering heat and an undisclosed ailment to defeat Holger Rune 6-3, 3-6, 6-3, 6-2 and advance to the quarterfinals of the Australian Open

The World No. 1, despite feeling unwell in sweltering conditions, kept up his title defense with a four-set triumph.