Despite taking a Jofra Archer delivery in the grille, Marnus Labuschagne insisted there was no way he was retiring hurt at Lord's.
While England have stuck with the same squad who were on duty at Lord's, James Anderson is stepping up his recovery from a calf injury.
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.
After England and Australia drew at Lord's, Joe Root said Jofra Archer's introduction has added a different dynamic to the Ashes.
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.