Owen Farrell made another match-winning contribution as Saracens claimed a record-equalling 24-10 European Champions Cup victory at Sale Sharks and Scarlets claimed a famous triumph over Toulon.
Sarries thumped Sale 50-3 last weekend, but by no means had things all their own way at AJ Bell Stadium as the reigning champions matched Munster's record of 13 consecutive wins in Europe's premier cup competition set between 2005 and 2007.
England international Farrell scored a late try after taking a brilliant offload from Will Skelton and provided 14 points with the boot before Nathan Earle went over in the closing stages to put the Pool 3 leaders eight points clear, with one foot in the quarter-finals.
Denny Solomona endured a frustrating debut for the Sharks following his controversial cross-code switch from Castleford Tigers and the home side had three players shown yellow cards in the second half.
Bryn Evans went over for Sale's only try just after Earle touched down and, although they gave a good account of themselves, they have now lost 15 consecutive matches in the competition.
Leigh Halfpenny missed two late penalties in his homeland and four in total as Scarlets moved just two points behind three-time champions Toulon with a tense 22-21 victory in the other Pool 3 clash at Parc y Scarlets.
Scott Williams scored the only try of the game in the first half, with all of the other points for the Pro12 club coming from the boot of Rhys Patchell.
Halfpenny kept the Top 14 heavyweights in it with a 21-point haul, but the Wales full-back was unable to take two opportunities to win it in the closing stages and Pierre Bernard's drop goal fell short as Scarlets held on for a stunning win.
Paul Willemse's red card for taking out Rory Kockott just after the hour-mark proved costly for second-placed Montpellier, who led Castres 23-19 at the time but slipped to a 29-23 loss in Pool 4 and are now just two points better off than their opponents.
Nick Abendanon scored two of ruthless Clermont Auvergne's five tries in a 38-19 defeat of Ulster which put the Top 14 leaders eight points clear at the top of Pool 5.