Steve Smith is a "champion" who did not deserve to be booed on his return to the middle at Lord's, according to Scott Morrison.
Omnisport spoke to expert Dr Sam Barke for his insight on concussions following Steve Smith's injury during the Ashes.
A half-century from Steve Smith's replacement Marnus Labuschagne proved valuable as Australia drew the second Ashes Test with England.
Ben Stokes' century and Jofra Archer's two early wickets gave England hope, but Australia batted out the final day to draw the second Test.
After replacing Steve Smith in Australia's line-up at Lord's, substitute Marnus Labuschagne was hit on the helmet by Jofra Archer.
Steve Smith received some boos when he came back out at Lord's after initially retiring hurt, much to the chagrin of Mitchell Johnson.
In a bid to force a positive result and level the series, England declared on 258-5 on the final day of the second Ashes Test at Lord's.
The former Australia captain will take no part in the final day of the second Test, but Steve Smith hopes to return at Headingley.
England made a strong start to day five of the second Ashes Test, Ben Stokes reaching 50 as the hosts extended their lead to 165.