They face Michael Hooper and David Pocock, who wrote the book on how to accommodate two openside flankers in the same international back row, and remain the stiffest pairing for any aspiring opponents.
While 21-year-old Curry, and Underhill, who is 23, have youth on their side against Pocock (31) and Hooper (27), the difference in international experience is massive. The Wallabies pair have played in a combined 180 tests while their English counterparts have just 28 internationals appearances between them. The England pair, pictured talking to coach Eddie Jones, are eager to take up that very physical quarter-final challenge.
"It's why we like the game and it is probably hard to explain to your mum," Curry said.
🚨Team Announcement🚨— Rugby World Cup (@rugbyworldcup) October 17, 2019
The @EnglandRugby side that will play against Australia in the quarter-final at #RWC2019. What do yo think of it?
📝 @JonnyMay to win his 50th cap #ENGvAUS #WebbEllisCup
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"It is brilliant and you cannot get it in any other walk of life. Part of the reason I love the game is the attrition and getting yourself mentally fresh and prepared, and it takes six or seven days to get ready."
While the breakdown might appear to be a confusing mess, to those who operate in the danger zone it is all about gaining a significant advantage over the opposition, and Underhill is relishing the prospect.
"You always want to challenge yourself against the best in the world and it is fair to say they (Pocock and Hooper) are two world-class opensides," Underhill said. They are players that I am sure Tom and I, growing up, looked at and aspired to be like and so it is a bit surreal to be coming up against them now.
"Ideally, you don't want to give them (opponents) space. If you take that away you will have an easier contest, if you don't you will have a more difficult contest.
🚨Team announcement🚨@wallabies have announced their team to play @EnglandRugby in the quarter-finals at #RWC2019#ENGvAUS #WebbEllisCup— Rugby World Cup (@rugbyworldcup) October 17, 2019
Find out where you can watch at https://t.co/z0BgdPYBjN pic.twitter.com/iLuuWfaa2V
"It relies on everyone, the ball carrier, relies on the support players, relies on your position on the field, everything.
"Technically, Hooper and Pocock are both very good over the ball. Pocock is probably the best in the world in terms of how strong he is, and his body position.
"On top of that they have good timing. Timing is probably the most important of the two. In a way they are kind of a victim of their own success.
"You can see how much emphasis teams put on negating players who are good at the breakdown now, and how much of a team effort it is."