Michael Cheika has described the Wallabies' lead-up to the Rugby World Cup as "perfect" but that has only muddied the selection waters for their opening Test against Fiji.

Cheika insists there are a host of contestable positions in his starting XV to face Fiji on Saturday and believes the pressure on selectors will be a constant throughout the tournament.

Selection choices: The Wallabies train at Shiroyama Athletic Stadium in Odawara, Kanagawa Prefecture, before facing Fiji on Saturday.

There are 30 fit players to choose from, with Suva-born outside centre Tevita Kuridrani declared "well back" by Cheika and in contention to face his native country.

Locks Adam Coleman and Rory Arnold have also shaken off niggles, leaving only teenage outside back Jordan Petaia (hamstring) out of contention.