An Aussie Derby, and an all-important one at that.
Both of these sides enjoyed pretty big billing in pre-season, yet it is the unfancied Reds who are upstaging them as they are well-entrenched in the top four with only a few rounds to go.
Should the Waratahs win here, they could end up in the top four themselves, whereas the Brumbies, three points further back, are by no means out of the race themselves, but will need victory against their countrymen to stay in touch with the pace-setters. Since these two sides are effectively fighting each other for a play-off spot, the winner essentially gets double points from this encounter.
Ref: Steve Walsh (Australia)
ARs: Nathan Pearce (Australia), James Leckie (Australia)
TMO: George Ayoub (Australia)
Venue: Sydney Olympic Park
Kick-off: 11:40 SA Time, 10:40 BST
Waratahs squad: Chris Alcock, Sosene Anesi, Al Baxter, Berrick Barnes, Kurtley Beale, Luke Burgess, Will Caldwell, Tom Carter, Dave Dennis, Kane Douglas, Damien Fitzpatrick, Adam Freier, Daniel Halangahu, Josh Holmes, Rob Horne, Sekope Kepu, Drew Mitchell, Ben Mowen, Dean Mumm, Dan Palmer, Tatafu Polota-Nau, Benn Robinson, Rory Sidey, Lachie Turner, Phil Waugh (captain).
Brumbies: 15 Julian Huxley, 14 Pat McCabe, 13 Andrew Smith, 12 Tyrone Smith, 11 Adam Ashley-Cooper, 10 Matt Giteau, 9 Josh Valentine, 8 Stephen Hoiles (captain), 7 Colby Faingaa, 6 Rocky Elsom, 5 Mark Chisholm, 4 Mitchell Chapman, 3 Salesi Ma’afu, 2 Stephen Moore, 1 Ben Alexander.
Replacements: 16 Huia Edmonds, 17 Guy Shepherdson, 18 Ben Hand, 19 Michael Hooper, 20 Patrick Phibbs, 21 Brackin Kaurauria-Henry, 22 Alfie Mafi.