A trio of second-half scores helped Ulster to a 28-7 win at Southern Kings in the Pro14 on Sunday.
Greig Laidlaw kept his cool to maintain Clermont Auvergne's perfect start to the new Top 14 season.
Glasgow Warriors are the only club to have won each of their opening three fixtures after overcoming the Cheetahs.
Saracens needed two late tries from David Strettle to secure a come-from-behind victory over Northampton Saints.
Argentina's resolve was key to the surprise win against Australia, says head coach Mario Ledesma.
Television footage showed Lukhan Tui arguing with a supporter following Australia's Rugby Championship loss to Argentina.
David Pocock was left frustrated by Australia's wastefulness as they were beaten by Argentina in the Rugby Championship.
Frustrations boiled over after Australia's loss to Argentina, with Lukhan Tui involved in an altercation with a fan.
Australia's dismal Rugby Championship continued with a rare home loss to Argentina on the Gold Coast.
Siya Kolisi warned South Africa not to rest on their laurels after upsetting world champions New Zealand in the Rugby Championship.
Charlie Sharples grabbed two tries as Gloucester rallied from a 10-point half-time deficit to see off local rivals Bristol Bears.
Edinburgh saw off Connacht to record their first Pro 14 win as Munster thrashed a much-changed Ospreys side on Friday.
The Wallabies will be without captain Michael Hooper for their clash against Argentina.
Prop Santiago Medrano and flanker Pablo Matera will both start for the Pumas against Australia on the Gold Coast.
After three years plying his trade in France, Ma'a Nonu will play for the Blues for a third time after signing a 12-month deal.
After losing to Australia last time out, South Africa boss Rassie Erasmus has decided to make a change at fly-half for Saturday.