Lions head coach Andy Farrell says there are injury concerns for some of his Irish players ahead of their opening game of the tour.
Following their arrival in Perth, Farrell says they are monitoring the fitness of Leinster pair Jamison Gibson Park and Hugo Keenan.
They open their campaign against Western Force on Saturday off the back of Friday night's warm up loss to Argentina.
The tourists will be formally welcomed at Kings Park and Botanic Garden in Perth today before getting back to training for the weekend's fixture.