Newcastle, Exeter, London Irish, Cardiff and Connacht recorded bonus-point wins in the Challenge Cup.
Jake White's first game in charge of Montpellier ended in a win over Toulon, while Stade Francais hung on to top spot.
Stade Francais shocked defending champions Toulon 30-6 to end the year at the summit of the Top 14.
Wins for Toulon and Clermont at the weekend has kept the race for top spot alive in France's Top 14.
Stade Francais took over the leadership of the French Top 14 on Friday with a five-try 43-30 victory at Grenoble.
Grenoble will be looking to keep their unbeaten home record intact when they host Stade Francais in the Top 14 on Friday.
Dewi Morris says the Top 14 is growing in stature, and will keep doing so with the inclusion of Dan Carter.
Saturday proved to be a Premiership party in the Challenge Cup, with wins for Exeter, London Irish and Gloucester.
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