Bath secured home advantage in the Gallagher Prem play-offs after beating Leicester 24-22 at a rainswept Recreation Ground.
Alex Hearle scored a hat-trick as Newcastle staged an incredible second-half comeback to secure a 45-42 triumph over Sale at Kingston Park.
Exeter's Gallagher Prem play-off hopes were dented as eighth-placed Gloucester shredded the formbook by beating them 34-31 at Kingsholm.
Bristol's Gallagher Prem play-off hopes were dealt a major blow after they suffered an 18-14 defeat against struggling Harlequins at the Principality Stadium.
Northampton returned to the top of the Gallagher Prem table despite a disjointed display in a narrow 28-27 victory over battling bottom side Newcastle.
Two-time European winners Munster were dumped out of the Champions Cup at the pool stage for just the fourth time since 1998 as they were stunned by Castres at Thomond Park 31-29.
Edinburgh staged a second-half comeback to pick up a hard-fought 26-24 win over Gloucester in the Champions Cup and consigned the visitors to a fifth straight defeat.
A late converted try from Kalaveti Ravouvou proved just enough for Bristol to maintain their winning run with a 19-17 victory as Sale lost on the road in the Gallagher Prem for a sixth consecutive game.
Richard Hibbard will rejoin the Wales squad on Monday after playing as a substitute for Gloucester at the weekend.
Will Greenwood heaped praise on fellow 2003 World Cup winner Mike Tindall following his retirement.
Miles Harrison is expecting Leicester and Gloucester to produce a fitting end to a cracking year of rugby.
Pat Sanderson and Dean Ryan take a look at this weekend's clash between Leicester and Gloucester.