An unbeaten double century from Dinesh Chandimal and a six-wicket haul for Prabath Jayasuriya guided Sri Lanka to an emphatic win over Australia to level the two-Test series.

Sri Lanka completed their win by an innings and 39 runs on day four.

Chandimal had earlier watched on as Kamindu Mendis (61) was bowled by Mitchell Swepson without adding to his overnight score, with Niroshan Dickwella (5) following to Nathan Lyon (2-194).

But Ramesh Mendis (29) provided ample support to Chandimal by surviving for 98 balls, as the latter brought up his double hundred with consecutive sixes against Mitchell Starc.

Chandimal was the last man standing on 206 – the highest score by a Sri Lankan against Australia in men's Tests – as Starc (4-89) and Swepson (3-103) cleaned up the tail with the hosts 190 runs ahead.

Sri Lanka continued in the ascendancy as Ramesh Mendis removed David Warner for 24, with the score on 49-1, after Dickwella earlier missed a stumping chance to remove Usman Khawaja when on just two.

Khawaja did not capitalise on that chance, falling for 29 to Jayasuriya (6-59), who removed Steve Smith without scoring four balls later, before Travis Head (5) failed in his defence against Ramesh Mendis (2-47).

Marnus Labuschagne (32) and Cameron Green (23) offered brief resistance but both were dismissed by Jayasuriya, who completed his second five-for of the Test when Starc departed for a two-ball duck.

Maheesh Theekshana (2-48) then trapped Pat Cummins (16) and Lyon (5) in front, before Jayasuriya dismissed Swepson (0) for his 12th wicket of the match to bowl the tourists out for 151 and seal Sri Lanka's first Test victory over Australia since 2016.

Dreamy Dinesh joined by Jayasuriya

Chandimal posted his maiden Test double century as he surpassed his previous high score of 164 against India in 2017 to press home Sri Lanka's advantage and help his side to a memorable win.

Kumar Sangakkara previously held the highest Sri Lanka Test score against Australia (192 in November 2007), but Chandimal eased past that benchmark with a remarkable 16 fours and five sixes in 326 balls.

Where's your Head at?

Head has struggled in the series against Sri Lanka, posting double figures in just one of three innings – though a high score of 12 leaves a lot to be desired.

More concerningly, Head has been bowled on two of his three dismissals, leading to questions over his defensive technique on spin-friendly, challenging pitches in the subcontinent.