Australia is without their star batsman Steve Smith for the opening one-day international against England on Friday after Smith was hit on the head by a ball in practice.
Australia said it is a precautionary measure after the incident on Thursday, which happened when a member of the coaching staff was throwing in the nets.
Australia added that Smith is being assessed for concussion and did not say whether Smith will be available for the second and third matches of the series taking place on Sunday and Wednesday, respectively.
England won the toss at Old Trafford and chose to bowl on what captain Eoin Morgan called a soft wicket.
Australia captain Aaron Finch said he would have chosen to bat anyway.
It is the fierce rivals' first ODI meeting since last year's Cricket World Cup, won by England on home soil.
Lineups:
England: Jonny Bairstow, Jason Roy, Joe Root, Eoin Morgan (captain), Jos Buttler, Sam Billings, Moeen Ali, Chris Woakes, Adil Rashid, Jofra Archer, Mark Wood.
Australia: Aaron Finch (captain), David Warner, Marcus Stoinis, Marnus Labuschagne, Mitch Marsh, Alex Carey, Glenn Maxwell, Patrick Cummins, Mitchell Starc, Adam Zampa, Josh Hazlewood.