Leinster have taken a huge step towards reaching the Quarter Finals of the Heineken Cup with a 29 points to 22 win over Castres in France.
Out half Jimmy Gopperth was the hero for Leinster, notching 21 points in all, including 2 tries.
Jordi Murphy got the other try for Leinster, while Rob Kearney scored a drop goal.
The win means Leinster need at least a point in next week’s game at home to the Ospreys to guarantee their place in the Quarter Final.
In the other game in Pool 1, Northampton beat the Ospreys 29-17.