Labuschagne century powers Australia but Windies dig in

West Indies were bowled out for 283 in their first innings

Marnus Labuschagne racked up another century on Saturday to help Australia set West Indies a huge target of 498 on day four of the first test in Perth, but the hosts still require seven wickets to secure a win on the last day.

Visiting captain Kraigg Brathwaite ended the day unbeaten on 101 to give his side, on 192-3 and trailing by 306 runs at the close, a fighting chance after Australia earlier declared their second innings on 182-2.

West Indies were bowled out for 283 in their first innings but Australia opted not to enforce the follow-on despite posting a massive 598-4 in their first dig.

A fiery Saturday morning spell by Alzarri Joseph, bowling with the sort of aggression that was missing on day one, had Marnus Labuschagne twisting and weaving early in the proceedings.

Caught at gully off a no-ball on 19, the zestful batsman capitalised on his good fortune and punished the weary fielders in an innings that became ever more belligerent as a lunchtime declaration loomed.

"I've certainly had the rub of the green on many occasions of late," Labuschagne told reporters.

"It must be all the prayers from my mum, my grandma and my family getting all set up at once."