Heavy overnight rain has forced Munster's crucial Champions Cup game against Castres Olympique to be re-fixed for 4pm.
Ground staff have been working tirelessly to remove surface water from the Thomond Park pitch to try and get the game started as scheduled at 1pm but referee Ben Whitehouse has decided to put back the kick-off by three hours to allow for conditions to improve.
Munster know that a bonus-point win will guarantee them top spot in Pool 4 and a home quarter-final but Castres have plenty to play for.
If Castres can pick up four points, deny Munster a losing bonus and Racing 92 lose to Leicester then they will top the standings in their group.
The postponement means that Johann van Graan's men will be aware of the Racing result ahead of their game and what they need to do to to seal a Thomond quarter-final.