Defending champions Toulouse, 2010 finalists Biarritz Olympique and former Heineken Cup winners Northampton Saints, Leinster and Leicester Tigers are the five teams to have made it two from two in the opening Rounds of the 16th season of the tournament.
Four-times champions Toulouse top Pool 6 with Northampton Saints, Leinster, Biarritz Olympique and Leicester Tigers clear leaders of Pools 1, 2, 4 and 5 respectively while in Pool 3 each of the teams have a win apiece.
Bonus points could be crucial when quarter-final qualification is decided in January with 10 teams banking priceless losing bonus points from 11 of the 24 matches - Edinburgh beaten by one point against Cardiff Blues and by four against the Saints.
Eight teams have collected try bonus points, Perpignan the only club to have scored four or more tries in both their matches.
