Pat Cummins and Nathan Lyon resumed at 8/313 this morning, with Australia having 101 runs advantage over Sri Lanka overnight.
Neither made it far, as the Australians were bowled out after adding just eight runs to the overnight score. Asith Fernando struck with two wickets, bowling both Cummins and Mitch Swepson.
That was it for the pace contribution for the day. Mitch Starc opened the bowling with two overs, while Nathan Lyon opened the bowling at the other end.
Starc proved expensive, going at almost two runs a ball in his short spell.
The Sri Lankan opening stand fought hard, with Dimuth Karunaratne and Pathum Nissanka
Karunaratne fell first, with a slight under-edge while sweeping Nathan Lyon, and a sharp catch by Alex Carey behind the stumps. It set things in motion for the wheels to fall off the Sri Lankan innings.
Just two runs later, Nissanka was back in the pavilion, having been adjudged LBW while trying to sweep Mitch Swepson.
Kusal Mendis was next, with a top edge while trying to sweep running down to Mitch Swepson, three quarters of the way back to the boundary.
Oshara Fernando followed shortly after, with an outside edge straight to Steve Smith from the bowling of Swepson.
But the Aussies weren't content to have the home side at 4/63 after 12 overs. They brought on a devastating secret weapon, who proved to be unplayable on the dusty Galle wicket.
Travis Head was thrown the ball, after only just proving his fitness and overcoming a hamstring injury before the Test match. He bowled 17 balls, in a spell that was reminiscent of Michael Clarke late on Day Five at an SCG test.
Head was unplayable, turning the ball from outside off-stump and cannoning into leg stump, for both Dinesh Chandimal and Jeffrey Vandersay.
He also picked up two wickets LBW, to finish with 4/10 from less tha. three overs.
At the other end, Lyon toiled through 11 overs, the duration of the Sri Lankan innings from one end, and finished with 4/31 himself.
The Australian captain didn't feel the need to bowl at any point, as his spinners had Sri Lanka all out with a lead of just four runs.
David Warner and Usman Khawaja were in no mood to bat for an extended period when they got to the crease.
Warner finished the match in the first over of the innings, with a reverse sweep for four, and a six over long-on to chase down the five runs required to take the total.
The Aussies will take a 1-0 lead in the series, and will now have an extended break to recover before the Secont Test, also in Galle, starting next week.