Leinster and Northampton Saints, who will meet in the Heineken Cup Final on Saturday May 21 in Cardiff have both reached the play-off semi-finals in their domestic league competitions.
Leinster had already secured a home semi-final in the Magners League before last weekend's final round of league action and they will face Ulster at the RDS this Friday for a place in the Magners League Grand Final for the second year running.
The Saints are also still in search for a double this season and their fourth place finish in the Aviva Premiership has secured them an away tie with Leicester Tigers this weekend.