London: Australia's star batsman Steven Smith has been ruled out of the third Ashes Test beginning tomorrow after suffering concussion, a decision which coach Justin Langer said was a "no brainer".

Smith — who has scored two centuries and 92 in his three innings in the first two Tests — was felled by a Jofra Archer bouncer on Saturday in the first innings of the second Test at Lord's. Smith's absence will be a huge blow to Australia who hold a 1-0 lead in the five Test series and for whom victory at Headingley would ensure they retained the Ashes.