Victory over Hull FC clinched St Helens the League Leaders' Shield as Dom Manfredi inspired Wigan on his return to action.
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.
Super League will revert to a more conventional 'one up, one down' promotion and relegation system in the 2019 season.
There will be a repeat of the 2016 NRL Grand Final in this year's preliminary round after Cronulla Sharks overcame Penrith Panthers.
As New Zealand once again set the pace, we look at the stats ahead of the latest round of fixtures in the Rugby Championship.
The Wallabies will be without captain Michael Hooper for their clash against Argentina.
Huddersfield Giants were blown away by eight-try Castleford Tigers in Friday's Super League clash.
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.
Glasgow Warriors are the only club to have won each of their opening three fixtures after overcoming the Cheetahs.
An eight-match suspension has been handed to Toronto Wolfpack's Jack Bussey after he pleaded guilty to a biting charge against Toulouse.
David Pocock was left frustrated by Australia's wastefulness as they were beaten by Argentina in the Rugby Championship.
Australia are set to welcome back Israel Folau, but the star was named on the right wing.
Television footage showed Lukhan Tui arguing with a supporter following Australia's Rugby Championship loss to Argentina.
Saracens needed two late tries from David Strettle to secure a come-from-behind victory over Northampton Saints.