MELBOURNE - 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.

and plays the Russian player Veronika Kudermetova. The boy wonder is at it again: Joao Fonseca converts his fourth set-point to take the opening set against Lorenzo Sonego, much to the delight of ...

We've had a glimpse there of what Veronika Kudermetova is capable of. She will pounce on any Katie Boulter mistakes. But, here comes Boulter. Kudermetova slams into the net and that takes us to deuce.

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