Paceman Steven Finn and allrounder Moeen Ali are in doubt for England's first pre-Ashes tour match.
Finn hurt his left knee while batting at practice on Thursday. He crouched to the ground in pain and limped off gingerly to the change rooms. Ali has a suspected side strain that has bothered him in recent days.
Both players were sent for scans.
England start a two-day tour match against a Western Australia XI side at the WACA ground on Saturday.
The 28-year-old Finn was only included in the Ashes squad after allrounder Ben Stokes was provisionally suspended following an incident outside a night club. Ali has played 44 tests for England.