Foreign minister Penny Wong warns Russia that all diplomatic options "are on the table" as officials scramble to verify reports that Australian man Oscar Jenkins has been killed in Ukraine.

Two-time defending champion Aryna Sabalenka has moved into the Australian Open quarterfinals with a 6-1, 6-2 win over 17-year-old Mirra Andreeva.

Prime Minister Anthony Albanese has sworn to take “the strongest action possible” if Russia has executed an Australian prisoner of war. Australian officials are urgently trying to ascertain whether Melbourne teacher Oscar Jenkins has been killed by Russian forces in Ukraine after being captured while fighting for Ukraine.

Australia has vowed it will take the “strongest action possible” if Russia has harmed one of its nationals captured fighting for Ukraine, after reports emerged the prisoner of war may have been killed.

A foreign soldier who trained Oscar Jenkins to fight in Ukraine accused Russian troops of torturing and executing the Australian man to make an example of him.

Alex Michelson has reached the fourth round at a Grand Slam tournament for the first time. He got there with a 6-3, 7-6 (5), 6-2 victory over No. 19 seed Karen Khachanov of Russia at the Australian Open on Saturday.

Day 8 action kicked-off with world no 1 Aryna Sabalenka sealing her spot in the quarter-final with a routine victory over Mirra Andreeva. India's Rohan Bopanna will be on the court in the mixed doubles action.

The Albanese government has left the door open to expelling Russia’s envoy if reports captured Australian fighter Oscar Jenkins has been executed are true.

Australia’s Prime Minister Anthony Albanese says his government will take the “strongest action possible” if Russia has harmed an Australian who was taken prisoner while fighting for Ukraine

Daniil Medvedev has been fined a total of $76,000 for his camera and racket smashing outbursts during the first two rounds of the Australian Open.

Two friends from California, Learner Tien and Alex Michelsen, have both reached the fourth round at the Australian Open. Tien is 19, and Michelsen is 20.