Fin Smith knocked over a last-minute penalty as Northampton beat league leaders Bath 35-34 in a pulsating game of nine tries.
Bath inflicted a record Gallagher Premiership defeat on 14-man Saracens as they powered to a 68-10 victory at the Recreation Ground.
Saracens climbed up to third place after a comfortable victory over Northampton in the Gallagher Premiership.
Northampton overcame the loss of injured captain George Furbank to post a statement 30-21 Investec Champions Cup win against the Bulls in Pretoria.
A round-up of Saturday's Investec Champions Cup action, where Northampton and Saracens made winning starts but Exeter were beaten by Sharks in South Africa.
Defending champions Northampton suffered a shock defeat to Gloucester, while Bath returned to top of the Premiership and Sale beat Leicester.
Bristol regained top spot in the Gallagher Premiership as centre Kalaveti Ravouvou scored two tries to underpin a 31-23 victory over champions Northampton at Ashton Gate.
Northampton bounced back from their derby disappointment in style as they trounced Sale while Newcastle earned their first Premiership victory in over a year.
Leicester made it three wins from four under Michael Cheika as they beat rivals and defending champions Northampton 24-8 on Saturday.
England wing Tom Roebuck scored two tries as Sale secured a breathless 31-27 bonus-point win over Gloucester in the Gallagher Premiership.
Leigh Halfpenny celebrated a first Gallagher Premiership try as Harlequins picked up a 28-14 bonus-point victory over Newcastle at Twickenham Stoop.
Michael Cheika's reign as Leicester head coach began in dramatic winning fashion as the Tigers claimed a 17-14 Gallagher Premiership victory at Sandy Park.
Mark Darbon has been appointed chief executive of the R&A and secretary of The Royal and Ancient Golf Club of St Andrews.
Northampton Saints sealed their first Premiership title for a decade, beating Bath 25-21 at Twickenham after Beno Obano's first half red card.
Bath fly-half Finn Russell says his side have to have trust and belief as they look to win their first Premiership title since 1996 when they take on Northampton in the final on Saturday at Twickenham.
Championship clubs have welcomed the approval of promotion to the Gallagher Premiership as a "new era" for the professional game in England.
Ahead of Saturday's Northampton Saints vs Bath Premiership final at Twickenham, Sky Sports looks back at the greatest witnessed so far...
All of the action from the final day of the Gallagher Premiership regular season, which saw the Play-Offs decided.
Northampton broke numerous records as they battered Gloucester 90-0 in the Gallagher Premiership.
Northampton fell short with a courageous second-half fightback as Leinster emerged 20-17 winners in their Investec Champions Cup semi-final at Croke Park
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