That is all the more important with the current record of home semi-finalists - no team has ever won a last four match on the road.
Ulster will be looking to put an end to that run and they will take confidence from their victory over the men from Dublin in round 21.
That 30-6 success helped them secure a fourth-place finish and a play-off place but Ulster have not yet beaten Leinster in a knock-out match in six attempts, although a draw back in 2003 was enough to see them through thanks to scoring more tries.
One thing in Ulster's favour is that they have the top points scorer left in the tournament in Paddy Jackson, while they finished the season with the best disciplinary record in the league, collecting just six yellow cards along the way.
For Leinster Isa Nacewa will be a key contributor, having been named in the Guinness PRO12 Dream Team and racking up eight tries in the regular season, the same number as Ulster flyer Craig Gilroy.
The second semi-final on Saturday pits play-off newcomers Connacht against defending champions Glasgow Warriors.
The teams should know each other well, having faced off in the final round of the regular season, where Connacht's 14-7 win earned them a home semi-final.
In their ranks Connacht have the competition's top try-scorer in Matt Healy, but the Warriors have the play-off experience, having beaten Ulster and then Munster on their way to a maiden title last year.
Connacht's home record this season has been outstanding though, with just one defeat to Ulster all campaign.
Whatever happens, we're sure to have a great final at BT Murrayfield on May 28.
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