Australia 330 for 3 (Carey 139*, Smith 120*) lead Sri Lanka 257 (Kusal 85, Chandimal 74, Starc 3-37, Kuhnemann 3-63, Lyon 3-96) by 73 runs

Seemingly having a ball experimenting with the reverse sweep, Steven Smith's mastery in Asia continued and he combined with a dashing Alex Carey to defy a sharp-turning, deteriorating Galle surface as Australia grabbed firm control of the second Test.

The game was in the balance when Australia were 91 for 3 just after lunch on day two in reply to Sri Lanka's first-innings of 257. But stand-in skipper Smith and Carey produced an unbroken 239-run partnership to deflate a Sri Lankan team staring down the barrel of a hefty series defeat.

Carey was fluent from the get go and motored past a tiring Smith by stumps as Australia build a sizeable first innings lead on a very dry surface.

Smith reached his 36th Test century in style with a boundary in the final session on day two and raised his baggy green before nodding several times to his team-mates in the terraces. He broke a couple of Australian records in Asia along the way having overtaken Ricky Ponting for most runs and his seventh ton lifted him past Allan Border.

After a few modest years by his lofty standards, Smith has rewound the clock in recent months having now scored four centuries in his last eight Test innings. Always looking to add to his repertoire, Smith dusted off rarely used reverse sweeps and, while not always effective, it did give Sri Lanka more to think about.

Smith might have been inspired by watching Carey, who swept - orthodox and reverse - almost flawlessly as he sped to his second Test century. Fittingly, Carey reached his ton with a sweep to the boundary as he raised his arms aloft to cap his strong form in recent months.

It was a significant moment for Carey, who had previously in Sri Lanka and India come under scrutiny for his compulsive use of the sweep. His sublime innings also included quick footwork and brute power as he repeatedly thumped the spinners straight down the ground.

Carey batted for the first time in his Test career at No. 5 with Josh Inglis having spent a significant period off the field in Sri Lanka's innings because of back spasms. But Carey was more than comfortable in a position he occupies for South Australia in the Sheffield Shield.

It was a major disappointment for Sri Lanka, who went wicketless for almost the entirety of the final two sessions. Their spinners occasionally produced sharp turn, but were unable to sustain the pressure and appeared out of answers as the day wore on.

Offspinner Nishan Peiris was their most threatening bowler in a good bounceback after he was ineffective in the first Test with 0 for 189 off 41 overs and deemed fortunate to retain his spot over legspinner Jeffrey Vandersay. He turned the ball square at times and almost clean-bowled Smith just before tea with a fizzing offbreak that narrowly missed the top of the stumps.

But Sri Lanka perhaps will rue not selecting Vandersay after his promising performance in the first Test, while talisman Prabath Jayasuriya lacked bite after a promising start and he resorted at times to a defensive leg-stump line to Smith.

Sri Lanka had begun with optimism at the start of Australia's innings. There was intrigue over whether Sri Lanka's spinners would take the new ball, but lone quick Lahiru Kumara started and opener Travis Head enjoyed the pace with three early boundaries. Skipper Dhananjaya de Silva surprisingly decided to share the new ball having not bowled in the first Test due to a side strain.

Head rattled along at a run-a-ball until on 21 he used his feet to Peiris but was outdone by turn, and a thick edge was taken at slip.

All eyes were then on Marnus Labuschagne, who only made 20 off 50 balls in Australia's massive 654 for 6 declared in the series-opener. Having not scored a Test century since the 2023 Ashes tour, pressure is mounting on Labuschagne with his spot for this match attracting some attention.

He started well with a first-ball boundary through the covers, but he didn't add any further runs and fell in the next over when he was trapped lbw by Jayasuriya in a decision overturned on review. Jayasuriya slid a fuller delivery that beat a tentative Labuschagne on the back foot. Labuschagne looked despondent when his fate was sealed and he trudged off the field.

Smith, wearing his baggy green, had a nervous start with a big lbw shout from Jayasuriya turned down as Sri Lanka burnt a review. But Smith countered the sharp spin by skipping down the pitch while Usman Khawaja unfurled the reverse sweep just like he did in his double-century last week.

They blunted the spinners as Australia reached lunch well placed at 85 for 2. The game sparked to life on resumption with Smith given out lbw by umpire Joel Wilson after a low Peiris delivery struck him under the knee roll. But Smith quickly reviewed and his confidence was justified with the ball hitting him well outside the line.

Moments later, Wilson was again quick to raise the finger but this time he was vindicated with Khawaja plumb lbw on 36 after he tried to pull Peiris only to misjudge the line and length.

But Sri Lanka's bid for more inroads came to a halt and they failed to put enough pressure on Carey, whose confidence grew as he slog swept offspinner Ramesh Mendis for six.

Smith brought up his half-century in style with a boundary as the runs continued to flow through to tea apart from when Jayasuriya restored to a leg-stump line. After the interval, Smith and Carey continued to score at ease as they tapped the ball around for singles with the field well spread as if it was the middle overs of an ODI.

After reaching his century, Smith appeared to be flagging amid the oppressive humidity and he dropped anchor as Carey took over to reach his landmark in fine fashion.

Earlier in the day, Sri Lanka finished with what appeared a competitive first-innings total after Kusal Mendis and No. 11 Kumara added 28 runs in the first 30 minutes of the day's play. Mendis was left stranded on 85 but had spearheaded Sri Lanka's recovery from 150 for 6.

Australia's three specialist bowlers Mitchell Starc, Nathan Lyon and Matthew Kuhnemann did the bulk of the heavy lifting and picked up three wickets apiece.