Warner was struck on the thumb on day four of Australia's four-wicket victory over the tourists in Brisbane - as Steve Smith's men moved to a 2-0 series lead.
The swashbuckling batsman said post-match at the Gabba that he would ice the problem area for a few days following the clash, and on Wednesday, Warner said he would be fine to take his place in Melbourne.
"It was a bit sore when it hit the splice or the toe of the bat but that's to be expected but I feel good and I'm ready to go," Warner said.
"[There's been] talk about [my] bottom hand being a bit looser and it's probably going to help me a bit I think but when the ball hits the splice I found out today it's going to be quite painful but I can bear that pain and I can get out there on Boxing Day.
"I tried to have a dip at the spinners to see if I could actually hit the ball as hard as I can and it did feel real sore but I had to try and grind it out and get through that pain and I was able to do that."
Warner and team-mate Shane Watson were two of the Australian players present when Phillip Hughes was fatally struck by a cricket ball in the Sheffield Shield in November.
And after Watson was struck on the helmet in the nets in Melbourne on Tuesday, the all-rounder was visibly distraught at the recreation the Hughes incident.
But his New South Wales team-mate Warner said Watson was better for the incident and returned to training as he built towards the third Test.
"He's a little bit shaken up yesterday and better for it today," Warner said.
"[Watson] went out there today and practiced as well as I've seen him hit the ball.
"It probably shook him up a lot more than he would have anticipated and he was close to Hughesy and he was one of those guys that was on the field as well, so it brought back a bit of a memory for him and he got back on the horse and trained again today, which was fantastic."