Jannik Sinner, Australian Open and Holger Rune

The World No. 1, despite feeling unwell in sweltering conditions, kept up his title defense with a four-set triumph.
Matteo Berrettini (No. 34 ranking) will take on Holger Vitus Nodskov Rune (No. 13) in the Round of 64 of the Australian Open ...
Defending champion and No. 1 seed Jannik Sinner easily dispatches host country's last hope; Ben Shelton takes on-court ...