The Western Force might have already booked their ticket for the Super Rugby AUS final, but who will join them is still up in the air as the final regular round commences.
The competition enjoyed a significant step up from its opening weekend, with strong crowds welcoming both sides to Tompkins Park and Narribri, respectively, with results blowing finals calculations wide open.
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The Waratahs currently sit in second after blowing away the Reds, but will face their first away trip of the season when they head to the spiritual home of ACT Rugby, Viking Park, to face the Brumbies.
A win would lock down their ticket to the final for good, while the Brumbies would need to produce a bonus point victory (plus hope the Force can defeat the Reds) if they are to sneak an unlikely final berth.
The Force, meanwhile, will look to maintain momentum ahead of the final when they welcome the Reds to Tompkins Park, and will be banking on a similarly strong crowd to get them over the line.
The Reds sit outside the finals position following their big loss to the Waratahs, but will be hungry to get their revenge following their second-half capitulation in Narribri.
Starting just outside Canberra, the Brumbies will look to make one last swing for the final, making three changes to the side that went down to the Force in Perth - which will include two debutants in ACT colours.
Stephen Larkham will stick with an unchanged tight five, with Rory Scott set to be handed the captain's armband while Jack Hartley will make his debut at number eight.
The side will also see a re-jigged backline, with First Nations Pasifika XV breakout star Jarrah McLeod set to start in the centres alongside Australia U20 alumni Kadin Pritchard, with Shane Wilcox moving to the win to allow Kye Oates to make his debut at fullback.
Luke Reimer and David Feliuai will drop back to the bench, significantly beefing up the hosts' finishing pack.
The Waratahs have made just one change to their starting side, with Clem Halaholo coming into the loose forwards in place of Chlayton Frans, with Leafi Talataina shifting around to cover Halaholo's inclusion.
Frans will drop to the bench, with Jack Barrett the only other change off the bench, coming in for Tom Lambert as the men in sky blue look to replicate last week's heroics to book their ticket to the final.
In Perth, the Reds have thrown the kitchen sink at the current ladder leaders, making seven changes to the side that lost to the Waratahs. This includes a new captain, with Matt Faessler taking the captain's armband, starting alongside Sef Fa'agese and Jeffrey Toomuga-Allen in the front row.
Hamish Muller will also come in and join Seru Uru in the engine room, while Tom Robertson and Vaiuta Latu retain their starting spots in the side.
In the backline, Harry McLaughlin-Phillips returns to the flyhalf position, with Wallaby Josh Flook slotting into the centres and Xavier Rubens on the right wing.
Several players from last week will drop to the bench, with new faces Trevor King, Charlie Brosnan and Will McCulloch completing the changes.
The Force meanwhile are pulling out all the stops in their triple header, with Wallaby Ben Donaldson set to start in the flyhalf position against the Queenslanders.
It will be one of three changes to the Force side that beat the Brumbies, with Jack Daly and Henry Palmer also coming into the side in the loose forwards and right wing, respectively, following strong training weeks with the squad.
The arguable form player of the competition, Max Burey, will move back to fullback to accommodate Donaldson's inclusion, with Mac Grealy shifting to the left wing.
Completing the changes, Viliami Fine will come off the bench following an opening fortnight on the left wing, while Australian U20 centre Boston Fakafanua will serve as utility option off the bench after suffering a HIA against the Waratahs.
BRUMBIES (1-15): Lington Ieli, Liam Bowron, Tevita Alatini, Lachlan Shaw, Harvey Cordukes, Toby MacPherson, Rory Scott (c), Jack Harley, Klayton Thorn, Declan Meredith, Ollie Sapsford, Jarrah McLeod, Kadin Pritchard, Shane Wilcox, Kye Oates
Replacements: Lipina Ata, Tauati Chan-Tung, Rhys van Nek, Tuaina Taii Tualima, Luke Reimer, Dan Nelson, Joe Dillon, David Feliuai
WARATAHS (1-15): Isaac Kailea, Ethan Dobbins, Daniel Botha, Ben Grant, Miles Amatosero, Clem Halaholo, Jamie Adamson, Leafi Talataina, Michael McDonald, Joey Fowler, Sid Harvey, Lawson Creighton (c), Jackson Ropata, Leo Jaques, James Hendren
Replacements: Bruce Kauika-Petersen, Jack Barrett, Apolosi Ranawai, Chlayton Frans, Austin Durbidge, Teddy Wilson, Otto Serfontein, James McGregor
FORCE (1-15): Marley Pearce, Albert Alcock, Tiaan Tauakipulu, Mitch Watts, Darcy Swain (c), Will Harris, Jack Daly, Vaiolini Ekuasi; Henry Robertson, Ben Donaldson, Mac Grealy, Kurtley Beale, George Poolman, Henry Palmer, Max Burey
Replacements: Wes Thomas, Max Sawers, Sean Paranihi, Max Johnson, Titi Nofoagatotoa, Issak Fines-Leleiwasa, Viliami Fine, Boston Fakafanua
REDS (1-15): Sef Fa'agase, Matt Faessler (c, Jeffery Toomaga-Allen, Hamish Muller, Seru Uru, Joe Brial, Tom Robinson, Vaiuta Latu, Kalani Thomas, Harry McLaughlin-Phillips, Tim Ryan, Dre Pakeho, Josh Flook (vc), Xavier Rubens, Heremaia Murray
Replacements: Theo Fourie, George Blake, Trevor King, Charlie Brosnan, Kohan Herbert, James Martens, Will Cartwright, Will McCulloch
