Bath are into the Premiership's top six after beating Wasps, while Gloucester won at Newcastle Falcons.
Back-to-back wins over Newcastle Falcons have Edinburgh closing in on a quarter-final place in the European Champions Cup.
There were wins for Ulster and Edinburgh over the Scarlets and Newcastle Falcons in the European Champions Cup on Friday.
Defending champions Saracens have won each of their opening nine Premiership fixtures as they stayed perfect by beating Wasps 29-6.
There were Premiership wins for Newcastle Falcons and Worcester Warriors on Friday, with the former moving off the foot of the table.
Gloucester had Danny Cipriani back from a ban and the fly-half was instrumental in their bonus-point 36-13 win over Leicester Tigers.
Maxime Medard's late try proved crucial as Toulouse beat European Champions Cup holders Leinster on Sunday.
Wasps fought back from a 22-13 deficit in the second half at Kingston Park to secure a third successive win in the Premiership.
Toby Flood's yellow card proved to be costly as Exeter Chiefs made it four Premiership wins out of four.
Saracens needed two late tries from David Strettle to secure a come-from-behind victory over Northampton Saints.
Alex Lewington and Owen Farrell helped Saracens to a handy away win at Newcastle Falcons on Sunday.
Scott Wilson said being forced to cut short his career is a "huge blow" but he will reflect fondly on representing Newcastle Falcons.
Leinster will have to see off three former champions if they are to retain their European Champions Cup title in 2018-19.
Joe Simmonds kicked 19 points as defending Premiership champions Exeter Chiefs set up a Twickenham showdown with Saracens for the title.
Newcastle Falcons will settle for fourth place and a clash with Exeter Chiefs in the play-offs after they were beaten at home by Wasps.
Newcastle Falcons boss Dean Richards has been rewarded for an outstanding Premiership season with a contract extension.