Wasps coach Dai Young criticised his side's inability to take their chances, despite their 23-3 win over Gloucester on Sunday.
Wasps bounced back from defeat to Leicester with a solid 23-3 victory over a disappointing Gloucester.
Exeter moved into second place as Gareth Steenson scored all their points in a 19-6 victory over Leicester at Sandy Park.
Promoted Worcester kept up their impressive start to the season with a bonus-point 28-20 win over Newcastle at Sixways.
Saracens beat Northampton 12-6 at Franklin's Gardens on Saturday to remain top of the Premiership.
Bath began life after Sam Burgess with a thumping 45-14 Aviva Premiership victory at London Irish.
New Zealand international Charles Piutau will make his Wasps debut in Sunday's Aviva Premiership clash with Gloucester.
Harlequins host a Sale side seeking a third successive Premiership victory on Friday night.