Joe Root has backed himself to score a maiden Test century in Australia as England search for a response in the Ashes after a dismal start.

England have been comfortably dispatched by Australia in the opening two Tests, succumbing to a 275-run defeat in Adelaide after a nine-wicket beating in Brisbane.

The tourists are without a win in 12 Test matches in Australia – their joint-longest such run (also 12 between January 1937 to February 1951) – and must defeat Justin Langer's side in Melbourne to stop them from retaining the urn.

Root has been in fine form, scoring 175 runs at an average of 43.75, but the England captain has yet to convert to three figures despite registering eight half-centuries in Australia - only Bruce Laird (nine times) has reached fifty more times in Tests Down Under without ever managing to a ton.

Indeed, Root has already surpassed Michael Vaughan (1,481 in 2002) for the most Test runs in a calendar year by an England player and sits fourth on the all-time list with 1,630 runs in 2021.

Root will eye the Boxing Day Test as a chance to further his record haul and the 30-year-old remains confident he can manage a maiden ton on Australian soil sooner rather than later.

"I expect a response from our players and I would like to bring a nice Christmas present home for everyone who stays up," Root told reporters.

"I feel in a really good place with my batting. I feel confident I can, in these next three games, bang out a hundred in these conditions.

"I know that's a brave thing to say but my conversion rate, this year, it's not been an issue at all.

"I feel like I have managed that well and have an understanding of how I want to score my runs. There's clarity there, I just need to keep putting myself in those positions, just have the bit between my teeth, [make it] 'over my dead body'".

Ashes 2021-22 Leading Run Scorers

Australia number three Marnus Labuschagne, who leads the Ashes scoring charts with 228 runs, overtook Root as the ICC's top-ranked men's Test batter and England's skipper admitted he wants his title back.

"I've never been one for that but it would be nice to have it back for Christmas," he responded when asked about being displaced at the top of the rankings.

Root will also be expecting a response from his bowling attack after he provided a scathing summary post-match in the second Test, in which he slammed his bowlers for repeating mistakes from four years ago and needing to be braver with their lengths.

He hopes his outburst, which was followed up by a "brutally honest" Chris Silverwood debrief with the England players, will act as a catalyst for change on Saturday.

"I did [get angry] at the end of the last game because of the situation we're in and the manner in which we lost," he continued.

"I'll always try to look at things with a level, pragmatic approach but I don't think you could after the way we've played those last two games. I expect a response from everyone this week.

"Twice now we've got ourselves into a position, second innings in Brisbane, first innings in Adelaide, with decent partnerships between me and Mala [Dawid Malan], we needed to go on and we didn't.

"Sometimes that can happen, but the first 20 balls, starting your innings, you've got to be disciplined, you've got to know how you're going to get yourself in the game and we can't afford to be losing eight wickets for 70 or 80 runs.

"It is not good enough, it is not the level that an England Test team should be playing at. The guys know that and they're very aware of that. Their work ethic is very good and you'll have seen how guys practiced and how long they bat for in the nets, but sometimes I think we can be smarter about what we are practicing and how we are practicing.

"And understanding that batting, in my opinion, it's about making good decisions for long periods of time."