The all-French Amlin Challenge Cup semi-final between Perpignan and Stade Francais Paris at Stade Aimé Giral on Friday, 26 April will be refereed by Munster referee George Clancy.
Heineken Cup Semi-Final:
Saturday, 27 April
ASM Clermont Auvergne v Munster Rugby, Stade de la Mosson, ko 6pm (5pm Irish time)
Referee: Nigel Owens (Wal); Assistant referee 1: Leighton Hodges (Wal); Assistant referee 2: Ian Davies (Wal); TMO: Gareth Simmonds (Wal); Citing Commissioner: Douglas Hunter (Sco)