The defending champions Leinster marched through to the knockout stages of the with victory over Glasgow Warriors at Firhill.
Since the opening draw with Montpellier, have now won four successive games and host the French side in Dublin on Saturday safe in the knowledge that they cannot be overhauled at the top of Pool Three, with their place in the quarter-finals secure.
Rob Kearney and Isaac Boss scored second-half tries as Leinster finally overcame the Warriors' stern defence, while Jonathan Sexton kicked one penalty and Fergus McFadden two penalties and two conversions.
The flanker Sean O'Brien was sin-binned four minutes from time, but Leinster's defence held firm to seal their progress.
The Warriors, who earned a losing bonus point, were always within striking distance, but Leinster's class told. Duncan Weir kicked 11 points, while the replacement Colin Gregor touched down for a try.
The Leinster coach, Joe Schmidt, insisted his side have a long way to go in the defence of their title. "We were just one of 24 contenders. After next weekend there will be eight contenders," he said.
"We're delighted to be one of those eight. As far as defending, it's not just defending the Heineken Cup. You've got to roll up your sleeves and go out and win it again."