Smith left the ground during the warm-up after he had batted in the nets and had a conversation with coach and selector Andrew McDonald. Smith had missed training on Monday due to illness after training on Sunday.
He returned to training on Tuesday and was first in the nets. But he did not look in full health during the net session and was also hit in the groin at one point which felled him and caused him to take a lengthy break.
Khawaja has been recalled after Australia had elected to leave him out despite returning to full fitness from a back injury, with the success of the Travis Head-Jake Weatherald in the first two Tests forcing the selectors’ hand.
Khawaja will turn 39 on Thursday, and become the first 39-year-old to play for Australia in 40 years.
More to come