French referee Pierre Brousset will be in charge for Leinster’s Investec Champions Cup semi-final against Northampton on Saturday.
He will be officiating his first last four game in the competition as Leo Cullen's side host the Saints at the Aviva Stadium.
Irish referee Andrew Brace will be the man in the middle for Sunday’s Champions Cup semi between top seeds Bordeaux Bègles and reigning champions Toulouse.
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