Sri Lanka 144 (Dickwella 64, Cummins 4-39, Richardson 3-26) and 1 for 17 trail Australia 323 (Head 84, Labuschagne 81, Lakmal 5-75) by 162 runs
Brisbane: Travis Head and Marnus Labuschagne missed individual centuries but forged Australia's highest partnership of the summer to earn the hosts a handy first innings lead against Sri Lanka on day two of the series opening day-night test on Friday.
Their 166-run stand powered Australia to 323 in reply to Sri Lanka's first innings total of 144 and Pat Cummins struck with the final ball of the day to reduce the tourists to 17 for one at stumps at the Gabba.
Lahiru Thirimanne was batting on six having lost opening accomplice Dimuth Karunaratne to Cummins for six with Sri Lanka trailing by 162 runs.
Head (84) and Labuschagne (81) highlighted in a 166-run represent the fifth wicket, outperforming the 112-run remain between Marcus Harris and Aaron Finch in the Perth test against India as Australia's best this season.
Continuing at 72-2, Harris (44) could just add four hurries to his medium-term score before offering a straightforward catch to Lahiru Thirimanne off Lahiru Kumara in the first over of the day.
Nightwatchman Nathan Lyon (one) likewise left before long leaving Australia on 82-4 when Labuschagne and Head steadied the innings, both raising their half hundreds of years in the center session.
Labuschagne, playing in his fourth test, scored his lady test fifty of every 97 balls with three limits in the wake of taking 20 balls to get off the stamp.
Head scored his fourth 50 years off 109 balls, with six limits, however was lucky to get by on 29 when he was dropped by wicketkeeper Niroshan Dickwella off Suranga Lakmal (5-75).
Labuschagne looked set to score Australia's first century since Usman Khawaja's 141 against Pakistan in October yet he chipped directly to mid-wicket off Dhananjaya de Silva.
Head's tilt at a leap forward hundred additionally finished in deplorability as he was caught lbw by Lakmal. Head's survey was futile as the ball following demonstrated the ball cutting the highest point of the stumps.
Next ball, Lakmal had Tim Paine edging through to Kusal Mendis who took a phenomenal jumping get at slip.
Cummins additionally withdrew without scoring, got behind off Dushmantha Chameera as the night conditions again offered a lot of help for Sri Lanka's swing bowlers.
Kurtis Patterson played some great strokes to make 30 on introduction before he turned into Lakmal's fifth wicket.