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 biggest win in Asia has ensured they will retain the Warne-Muralitharan Trophy - regardless of the outcome of the second test nex week.

Dinesh Chandimal's unbeaten half-century and persistent rain in Galle delayed Australia's push for victory in the opening test against Sri Lanka on Friday. Only a 27-over session was possible on day three with Sri Lanka losing two wickets and slumping to 136-5 before rain stopped play.