FORWARDS coach Jono Gibbes has pointed to Ulster hooker Rory Best and flanker Chris Henry as two men Leinster have to subdue to get the platform they want at the set-piece and the breakdown.
"If we are to be honest, in both those games, Rory was superb in the scrum," said Gibbes, referring to Ulster's regular season double over Leinster.
"The players speak highly of him and have great respect for him. I think one of the key things in those two games was the scrum battle and how things got interpreted there.
"That's a big challenge this week as well and one we are looking forward to because it is John Lacey (refereeing) this week and we are pretty confident in his ability to handle that particular area of the game."
Once the ball moves away from the scrum and line-out, the back-row forwards become more significant in terms of earning and maintaining front-foot ball.
"I'm a big admirer of Chris Henry, I really like him," he added.
"I think when I first got here he was playing number eight up there and was a bit peripheral, but he's reinvented himself and has a massive influence in the contact area.
"He's a bit of a thorn in our side to be honest, he's that effective. I think they'll probably look at that RDS tape and take out the things that worked really well for them and it's up to us to negate their positives.
"We know what they're going to bring, what they are really good at, and we know who are the front-line assets for them.
"We need to negate a little bit of that and impose a bit more of our game on them."