Australia v South Africa: Usman Khawaja set to double first century as Australia dominate

Australia v South Africa, Third Test, Sydney (day two of five)Australia 475-4 Khawaja 195 (not out), Smith 104South Africa: Still to beatAustralia leads three rounds of Tests 2-0Scorecard

The 36-year-old had taken a career-high 195 steps when rain stopped play at the Sydney cricket ground.

Steve Smith scored 104 before tea to become the 14th player to record 30 test centuries.

And Travis Head ran 70 from 59 after the break to further dash the visitors' hopes.

Khawaja, whose previous highest score was 174 against New Zealand in Brisbane in 2015, shared a stand of e 209 runs with Smith as they punished the beleaguered Proteas. In his own innings, Smith also passed Matthew Hayden and Michael Clarke to become Australia's fourth highest Test scorer.

Matt Renshaw, who tested positive for Covid-19 on Wednesday, emerged from solitary confinement to join Khawaja in reaching the unbeaten five-in-one strains.

Australia sealed the series with wins in Melbourne and Brisbane and can secure their place in the final of the World Test Championship with another victory.