Root equalled predecessor Sir Alastair Cook on 59 games during the Boxing Day rout in Melbourne.
The 31-year-old will be looking to put that loss behind him as he breaks new ground and marks his 60th appearance as captain in Sydney.
Despite the seismic milestone, the mood is hardly one of celebration around the England camp. The series has gone, scattered to the four corners of the MCG in the aftermath of an innings defeat, and the continued creep of COVID-19 has made for an anxious week off the field.
With head coach Chris Silverwood one of four backroom staff isolating with the virus, Root's leadership role has expanded even further in the run-up to the match.
After four-and-a-half years at the helm nobody knows the landscape better than him, and he is well aware that only a vast improvement of his side would allow him to truly savour the moment.
Root said: "I'm immensely proud to have been given the opportunity to do this. That's not wavered from day one and it won't until it finishes, whenever that is.
"I'm very passionate about playing for England, then to captain England as well is a huge honour. All I ever want to do is try to get the best out of the group, to see us perform and play at a level everyone back home is proud of.
"It's hurt me deeply that we've not managed to do that on this trip and I'm desperate for us to put in those performances. I really care about the role and it would be nice to finish this tour off in a much better way.
"I'd love to be able to walk away here, more than anything, with a win. Personal goals make you proud and it means you are pulling your weight and giving your team a good chance of winning, but nothing compares to winning a Test match and I'm desperate to do that."
Root is happy to acknowledge the SCG as "an iconic" venue but it is also one that represents unfinished business for him.
As well as suffering from a bout of gastroenteritis here four years ago as a 4-0 series defeat was wrapped up, it was this ground where Root was dropped for the only time by England in 2014.
It is a memory that has never left him and one he has been passing on to his struggling team-mates.
"It's important if guys haven't been in that situation before and haven't had to deal with that, you share your own experiences," he said.
"I remember being left out, how upset I was…how angry I was. You learn lessons from that. They are some of the conversations you need to have. Sydney is obviously a special Test match.
"You look at some of the performances in previous tours…you look at 2010/11, winning here and how special that was. That will live long in the memory of fans and players.
"It was here Goughy (Darren Gough) got a hat-trick. It's a venue where a number of special things have happened for England players and it's an opportunity to do just that."
England are busy finalising their team and Stuart Broad's name is sure to occupy much of the discussion.
The 35-year-old, England's third highest Ashes wicket-taker with 120, has only been picked once so far, and used his newspaper column to express frustration at missing out on seaming pitches in Brisbane and Melbourne.
"He'll obviously be disappointed to have missed out, as is everyone when they don't play," said Root.
"All I'd say is from Stuart's point of view is when he gets his opportunity he's going to look to take it. He's someone who always tries to prove everybody wrong and when he's missed out in the past he's done that extremely well."