Donnacha Ryan finally made his bow for Racing 92, but it ended in a 27-17 Top 14 defeat to Stade Francais.
Ryan, who has been out with a neck injury, started in the visiting second row at Stade Jean-Bouin in what his first appearance since Munster’s Pro12 final defeat to Scarlets back in May.
Stade Francais were in total control at the break, leadingg The home side were full value for their win as they dominated for large periods and held a comfortable 24-7 lead at half-time thanks to tries from Sekou Macalou and Waisea Nayacalevu.
So'otala Fa'aso'o gave Racing some hope when he ran in on the turnaround but Stade closed it out to take the bragging rights.
Ian Madigan fired Bristol into a fourth-minute lead off the tee at Donacster Knights but Pat Lam's men had to go to utilise their full armoury to kill off a stubborn Doncaster Knights.
Alapati Leiua dived over two minutes from time to seal the bonus in a 38-18 win at Castle Park.
Madigan notched three more penalties and three conversions to bring his haul 18 points for the Championship table-toppers.
Donncha O’Callaghan suffered bitter disappointment on a freezing Friday night in Worcester as his Warriors fell to an 18-14 loss against Sale Sharks.
Captain Callaghan played 76 minutes of an attritional battle.
Mark Jennings settled it in the 71st minute, dotting down through a crowd of bodies with MacGinty nailing the conversion.
The hosts threw everything at their opponents to try and pull it out of the fire but Sale hung on.
Marty Moore played the final 24 minutes of Wasps' pulsating 32-25 defeat of Leicester Tigers at the Ricoh Arena.
Kearnan Myall barged his way over right at the death to snatch victory and move the hosts up to fifth in the Premiership.
Former Leinster prop Moore will return to Ireland next summer having agreed a two-year deal with Ulster.