Tomorrow's fixture is the first of two vital matches in Leinster's campaign to reach the knockout stages of the European Rugby Champions Cup.
This is coming on the back of a hard-fought victory in Cardiff last week.
We at OLSC Towers know that all supporters will make themselves heard for the full 80 minutes against Castres and urge the boys in blue to a positive result.
Following tomorrow's match, the focus for all Leinster supporters will turn to the final pool fixture against Wasps.
For those supporters travelling to Coventry, the OLSC, in association with Bank of Ireland, will be publishing an Away Guide.
As this is a new location to visit for supporters, the guide will have everything you need for the visit, including details of our Supporters HQ and things to see and do in the Coventry area.
The away guide will be available for download from our website, www.olsc.ie, on Tuesday.
We also make details of TV and radio and internet coverage of all Leinster's matches available online, so no matter where you are in the world on matchday, you will be able to keep up with the action as it happens.