Bumrah back for his second spell, with around 12 minutes left for lunch. Khawaja misses the clip off his pads before he manages to push the next ball into the leg side.
The left-hander inside edges the third ball into the leg side followed by a leave.
He watchfully keeps out the last two balls to play out a maiden over from Bumrah.
Akash Deep back into the attack as he takes over from Jadeja. Labuschagne flicks the first ball through midwicket for a couple of runs and then takes one off the next.
Khawaja plays a nice drive off an overpitched as Siraj at mid-off can't stop the ball cleanly as he dives and ends up conceding three runs.
Bumrah to bowl the final over of the session. He completely squares up Khawaja as the left-hander gets a thick outside edge past gully for three runs.
Khawaja at his watchful best as he defends the next few before taking one and Labuschagne misses the last ball which is down the leg side.
Australia go into the lunch break on Day 1 on 112/1 in 25 overs.
Khawaja is unbeaten on a solid 38 from 73 balls, while Labuschagne has made 12.
But the morning session belonged to the debutant Konstas, who took apart Bumrah, on his way to an entertaining 60 from 65 balls.