It's Leinster’s turn to take part in European competition today as they play Toulouse this afternoon.
Leinster need to win by 35 points or score three tries to top the group and emerge as group winners for the home draw in the next round.
The sides were originally supposed to play in Toulouse last year but an explosion in a chemical plant in the town meant that the match was moved to Dublin instead.
If Leinster win the match but fail to top the qualifiers then it will set up a clash with Munster in a repeat of the Celtic League final, which would probably take place in Lansdowne Road.
However, if Leinster lose today, they will play reigning champions, Leicester at Welford Road.