Australia's Steven Smith plays a shot during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Usman Khawaja celebrates his hundred and fifty runs during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Steven Smith plays a shot during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Steven Smith plays a shot during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Steven Smith shares a light moment with Usman Khawaja during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Sri Lanka's Jeffrey Vandersay successfully appeals for the wicket of Australia's Steven Smith during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Steven Smith acknowledges the crowd as he leaves the ground after losing his wicket during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Usman Khawaja celebrates after scoring a double century during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Josh Inglis, right, congratulates Usman Khawaja for scoring a double century during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Josh Inglis celebrates his fifty runs during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Usman Khawaja leaves the ground after losing his wicket during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Usman Khawaja leaves the ground after losing his wicket during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Josh Inglis plays a shot during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Josh Inglis celebrates his century during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Sri Lankan team members leave the field at the end of the first innings during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Matthew Kuhnemann celebrates the wicket of Sri Lanka's Oshada Fernando with teammates during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Mitchell Starc celebrates the wicket of Sri Lanka's Dimuth Karunaratne with teammates during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.

Australia's Nathan Lyon and teammates celebrates the wicket of Sri Lanka's Angelo Mathews during day two of the first test cricket match between Sri Lanka and Australia in Galle, Sri Lanka.