Cam Green is looking to combine with Australia's lower order as day two begins in Mackay, after a frenetic 18-wicket opening day against Bangladesh.
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Luckily for Webster, Starc completed his five-fa the very next ball.
Two lethal left arm quicks combined for 12 wickets, Australia came close to snaring the rarest of dismissals, and a Harrup Park specialist failed on his return. Here are the quick hits from day two.
Cameron Green and Marnus Labuschagne both came into the two-Test series against Bangladesh under pressure — but only the rejuvenated allrounder has enhanced his status in the Australian team.
Green, thanks to a sublime knock of 104 in Darwin and a half-century in tough conditions in Mackay, will be on the plane to South Africa for October's three-Test series after two compelling knocks at No.5.
Yet No.3 Labuschagne's struggle to find form and runs endures.
After his first innings knock of four in the second Test against Bangladesh in Mackay, the 32-year-old Labuschagne now has gone 23 Tests and 43 innings at an average of 24.69 without a century, in a format where he had scored 11 tons in his first 42 Tests.
Of concern is the manner of his dismissals against Bangladesh. An indecisive nudge to slip for one in the first Test in Darwin was followed by missing a straight delivery after scoring 31 in the second innings.
In Mackay, in the first innings of the second Test, Labuschagne missed a Shoriful Islam delivery on leg stump and the ball deflected off his thigh pad and onto the wickets after making just four.
Coach Andrew McDonald said after the Darwin Test that Labuschagne needed "big runs".
Captain Pat Cummins and No.3 batter Steve Smith have come to Labuschagne's defence in the past two days.
"I actually think he is batting really well at the moment," Smith told the host broadcaster before play on day one of the Mackay Test.
Batters in the Sheffield Shield have hardly made a compelling case to replace him, but Labuschagne's issue has been that he is not getting in the contest in Test cricket enough.