Dinesh Chandimal has scored an unbeaten 63 as Sri Lanka struggled to 136-5 at lunch on Day 3 in reply to Australia's imposing first innings of 654 in the first cricket test.

Australia's utter dominance on the proceedings in Galle continued on a hot Day 3 as Sri Lanka were five down in the morning session, while still staring at a deficit of 518 runs when rain forced an early Lunch break.

Sri Lanka is staring down the barrel at 44-3 after Australia achieved its largest ever total in Asia — 654-6 declared — on day two of the first test in Galle.

Usman Khawaja's double hundred and twin centuries from Steve Smith and Josh Inglis helped Australia take complete control over Australia on Day 2 of the Test match.