Steve Smith has passed his concussion checks and returned to the field in Durban in a massive boost to Australia's hopes of winning the Test series in South Africa.
Smith was sidelined from fielding on Monday afternoon after being struck on the side of the helmet by Anrich Nortje while batting on the morning of day four.
He initially passed an on-field test and continued batting, but Australia's medical staff then planned to continue assessing him for any delayed symptoms.
