After the most competitive Rugby Championship to date we've entered the final week with three sides all within touching distance of the title.
While the Springboks currently lead the table and look unlikely to relinquish the trophy, both the All Blacks and Wallabies are possibilities to be named the southern hemisphere's best team.
Kicking off the action the Wallabies will host the All Blacks in Bledisloe II in Perth, before the Springboks and Pumas will face-off at Twickenham in London to round out the series.
Read on as we bring you the latest team news below and look ahead to the Round 5 clashes.
Saturday, October 4
Australia vs. New Zealand, Optus Stadium Perth, 7:45pm AEST [5:45pm AWST, 10:05pm NZST, RSA, ARG]
Wallabies: Max Jorgensen, Harry Potter, Joseph-Aukuso Suaalii, Len Ikitau, Filipo Daugunu, Tane Edmed, Jake Gordon, Harry Wilson, Fraser McReight, Tom Hooper, Will Skelton, Nick Frost, Allan Alaalatoa, Billy Pollard, James Slipper.
Replacements: Josh Nasser, Tom Robertson, Taniela Tupou, Jeremy Williams, Rob Valetini, Ryan Lonergan, James O'Connor, Josh Flook.
All Blacks: Will Jordan, Leroy Carter, Quinn Tupaea, Jordie Barrett, Leicester Fainga'anuku, Damian McKenzie, Cam Roigard, Peter Lakai, Ardie Savea, Simon Parker, Tupou Vaa'i, Scott Barrett, Fletcher Newell, Codie Taylor, Tamaiti Williams.
Replacements: Samisoni Taukei'aho, George Bower, Pasilio Tosi, Patrick Tuipulotu, Wallace Sititi, Cortez Ratima, Rieko Ioane, Ruben Love
Team news: As expected both coaches have made plenty of changes to their line-ups, some forced others through reinforcements. Joe Schmidt has bolstered his line-up with Jake Gordon returning for the first time since July, replacing the injured Tate McDermott, while Will Skelton slots into the second-row in his return from France. Allan Alaalatoa makes his first start since a shoulder injury, while Filipo Daugunu moves onto the wing to bring more muscle in replacing Corey Toole. The bench has also seen changes with Lukhan Salakaia-Loto and Angus Bell failing to earn selection. Meanwhile, the All Blacks have seen several chances with Damian McKenzie elevated to starting fly-half through Beauden Barrett's injury, Scott Barrett makes his return to the line-up and Leicester Fainga'anuku slots onto the wing in Caleb Clarke's absence. Peter Lakai has been named to make his first Test start with Wallace Sititi moving to the bench.
Prediction: The Bledisloe may be back in New Zealand Rugby's cabinets but there's still plenty to play for in Perth. Currently enjoying a 10 game win streak over Australia, the All Blacks will be determined not to let that slip while also finding consistency in performance after they were pushed to the wire in Auckland a week ago. Meanwhile, the Wallabies will be desperate to send out veteran James Slipper on a high after he announced Saturday's clash would be his final in the gold jersey. The pressure will be on Tane Edmed to make an impression in the starting No.10 after his only start in Sydney two weeks ago, while Will Skelton will need to bring the muscle up front. Both backlines look set to play hard and fast rugby, but light rain expected could impact handling.
Wallabies by 3
South Africa vs. Argentina, Twickenham Stadium, London, 11pm AEST [2am NZST, 2pm BST, 3pm RSA, 10am ARG]
Springboks: Damian Willemse, Cheslin Kolbe, Canan Moodie, Damian de Allende, Ethan Hooker, Sacha Feinberg-Mngomezulu , Cobus Reinac, Jasper Wiese, Pieter-Steph du Toit, Siya Kolisi, Ruan Nortje, Eben Etzebeth, Thomas du Toit, Malcolm Marx, Ox Nche.
Replacements: Bongi Mbonambi, Jan-Hendrik Wessels, Wilco Louw, RG Snyman, Kwagga Smith, Grant Williams, Manie Libbok, Jesse Kriel
Pumas: Santiago Carreras, Bautista Delguy, Justo Piccardo, Santiago Chocobares, Juan Cruz Mallía, Gerónimo Prisciantelli, Simón Benítez Cruz, Santiago Grondona, Marcos Kremer, Pablo Matera, Pedro Rubiolo, Guido Petti, Joel Sclavi, Julián Montoya, Mayco Vivas.
Replacements: Ignacio Ruiz, Boris Wenger, Francisco Coria Marchetti, Franco Molina, Juan González, Joaquín Oviedo, Agustín Moyano, Rodrigo Isgró.
Teams news: Rassie Erasmus has made just four changes to his side that punished the Pumas in Durban a week ago. Ox Nche makes his return after a late scratching last week, while Grant Williams, Jesse Kriel and Bongi Mbonambi return via the bench.
Predictions: