Lions duo Wales doubts
Wales are sweating over the fitness of Ospreys duo Rhys Webb and Justin Tipuric ahead of the clash with the Wallabies in Cardiff on Saturday.
Scrum-half Webb and flanker Tipuric both have leg injuries and are battling to be fit.
"We have a couple of knocks with Rhys Webb and Justin Tipuric," Wales defence coach Shaun Edwards told BBC.
"We will wait until the last minute until we name the team on Thursday.
"We will give them as much time as possible before making an educated decision."
Edwards said the British and Irish Lions 2017 tourists must prove their fitness or they wouldn't be considered.
Wales face Georgia, New Zealand and South Africa on consecutive weekends after the match against the Wallabies.
"They will have to take some part in training before Thursday to put their hands up for selection," he added.
"If not they will probably put their hands up for the week after and it's a four game series.
"Both were on the British Lions tour recently and played very well.
"But if one man goes down the next one will come in and be determined."