Dan Biggar is on course to be fit and available for Wales' next World Cup game against Fiji.
The fly-half went off in the 28th minute of a pulsating Pool D victory over Australia two days ago after making a try-saving tackle on Wallabies centre Samu Kerevi.
He failed a head injury assessment, and was replaced by Rhys Patchell, who kicked 14 points as Wales clinched a memorable 29-25 win.
"Dan is symptom-free at the minute, and obviously just doing his protocols as you normally would," Wales assistant coach Neil Jenkins said.
"As far as I understand, he will be ready to go by the time we play Fiji (on 9 October), so that's obviously good news.
"It's bumps and bruises other than that, normal stuff from a Test match of that size.
"Dan is an outstanding rugby player, a world-class rugby player, so he's a huge part of our team and the way we like to play the game.
"I think we must not forget how good Rhys Patchell was when he came on, and how good a player he is as well. We are quite lucky to have the strength in depth that we have in our squad."
Patchell's composed performance helped Wales successfully navigate their way to victory as they held off a turbo-charged Wallabies fightback to take charge of Pool D.
Asked if it was the best form he had seen Patchell produce in a Wales shirt, Jenkins added: "In a game of that size, you could probably yes, but he was exceptional last summer in Argentina and the Six Nations a couple of years ago against Scotland.
"He was excellent on Sunday. He came on and played the game we wanted to play and put us in the right areas and got us the lead we maintained to win the game."
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