The EPCR Champions and Challenge Cup are reaching boiling point, with just four teams left in the hunt for European glory!

Our semi-final weekend begins on Saturday with three huge fixtures. We first venture to the Stoop as the Sharks take on Clermont Auvergne. This is swiftly followed by a visit to Kingsholm, as Gloucester face Benetton Treviso.

We then turn our attention to historic Croke Park, as Leinster face Northampton Saints at the home of GAA. This game is also a repeat of the infamous 2011 Heineken Cup final, which Leinster won 33-22 despite falling behind.

Rounding off a blockbuster weekend of European rugby, Toulouse take on Harlequins at Le Stadium. This is the first time Harlequins have ever reached the semi-finals of Europe’s premier competition.

But who will referee the fixtures?

Mathieu Raynal takes charge of the headline clash between Leinster and Northampton Saints at Croke Park, and he is joined by an all-French team of Pierre Brousset, Luc Ramos and TMO Thomas Charabas.

Andrew Brace is the man in the middle for Toulouse vs Harlequins. Chris Busby, Eoghan Cross and TMO Olly Hodges will assist him.

Luke Pearce is named for the first Challenge Cup semi-final of the weekend, alongside Karl Dickson, Matthew Carley and TMO Tom Foley.

Nika Amashukeli heads up the clash at Kingsholm, with Mike Adamson, Sam Grove-White and TMO Ben Whitehouse also joining him.

Investec Champions Cup semi-final referee appointments

Leinster vs Northampton Saints

Referee: Mathieu Raynal

Assistant referees: Pierre Brousset, Luc Ramos

TMO: Thomas Charabas

Toulouse vs Harlequins

Referee: Andrew Brace

Assistant referees: Chris Busby, Eoghan Cross

TMO: Olly Hodges

EPCR Challenge Cup semi-final appointments

Sharks vs Clermont Auvergne

Referee: Luke Pearce

Assistant referees: Karl Dickson, Matthew Carley

TMO: Tom Foley

Gloucester Rugby vs Benetton 

Referee: Nika Amashukeli

Assistant referees: Mike Adamson, Sam Grove-White

TMO: Ben Whitehouse