Stand-in captain Steven Smith scored his 10,000th Test run before completing the momentous occasion with a majestic century, while Usman Khawaja reached his 16th ton as Australia were rewarded for an aggressive approach against a spin-heavy Sri Lanka attack on a slow Galle surface.

Steve Smith became the 15th member of test cricket's 10,000-run club as he and opener Usman Khawaja smashed hundreds to help Australia rack up 330 for two on the opening day of the first test against Sri Lanka in Galle on Wednesday.

Skipper Steve Smith crossed a milestone 10,000 runs in Test cricket as Australia reached 145-2 at lunch on day one of the first match against Sri Lanka. He became the 15th batsman to 10,000 Test runs and only the fourth Australian to achieve the feat after Allan Border,