Exeter Chiefs were made to pay for last Saturday's bonus-point win over Clermont Auvegne in the European Champions Cup, losing 42-10 to the French giants in Sunday’s reverse fixture.
Ulster completed a European Champions Cup double over Toulouse to inch themselves closer to the competition’s quarter-final with a narrow 25-23 triumph at Stade Ernest Wallon.
Fijian wing Josaia Raisuge scored a brace of tries as Stade Francais convincingly beat Treviso 40-14 in Paris to maintain the pressure on European Rugby Champions Cup Pool 4 leaders Leicester.
Glasgow Warriors marked their 100th game in the European Cup by doing the double over Guinness PRO12 rivals Scarlets to stay in the hunt for a quarter-final place in the European Champions Cup.
Ospreys' second-half comeback proved in vain but they still collected two losing bonus points in a 33-27 defeat at Bordeaux-Begles to keep their hopes of qualifying for the European Champions Cup quarter-finals alive.
Toulon turned on the power in the second half to secure a 20-16 win at the Aviva Stadium and end Leinster's interest in this season's European Champions Cup.
Fly-half Jimmy Gopperth scored 23 points as Wasps recorded their second away win of their European Champions Cup campaign to remain firmly on course for the knockout phase.
Chris Ashton scored a hat-trick of tries as Saracens remained unbeaten in all competitions this season with a convincing 55-13 European Champions Cup Pool 1 victory over Top 14 strugglers Oyonnax at Allianz Park.
Northampton's English contingent failed to make a substantial impression in front of a watching Eddie Jones as the new England coach resumed his busy pre-Christmas scouting tour of the Aviva Premiership clubs.
George Ford kicked a match-winning conversion with the game's final kick as Bath dramatically ended Wasps' unbeaten European Champions Cup record with a 25-23 victory in front of England head coach Eddie Jones.
Reigning champions Toulon got back to winning ways in the European Champions Cup and sent another triple winner Leinster out of the reckoning for another title with a 24-9 defeat at Stade Mayol.
Saracens maintained their unbeaten start to the season and took a stranglehold on Pool 1 of the Champions Cup with an emphatic 45-10 bonus-
point win over tournament newcomers Oyonnax.
Dan Biggar scored all 19 points to keep Ospreys joint top of Pool Two in the European Champions Cup, but it was an unconvincing performance from the hosts.
Following a postponement in Paris and a home defeat to Northampton, Glasgow scored six tries to win their first European game of the season, beating Scarlets 43-6.