The match officials for this weekend's matches have been confirmed, with Jérôme Garcès taking charge of Munster's visit to Leicester on Sunday.
Champions Cup, Round 4
Pool 1
Saracens vs Oyonnax at Allianz Park
Referee: George Clancy (Ireland)
Assistant Referees: Peter Fitzgibbon (Ireland), Jonathan Peak (Ireland)
TMO: Marshall Kilgore (Ireland)
Toulouse vs Ulster
Referee: JP Doyle (England)
Assistant Referees: Darren Gamage (England), Paul Burton (England)
TMO: David Grashoff (England)
Pool 2
Bordeaux-Bègles vs Ospreys
Referee: Luke Pearce (England)
Assistant Referees: Matthew Carley (England), Peter Allan (England)
TMO: Rowan Kitt (England)
Clermont Auvergne vs Exeter Chiefs
Referee: Marius Mitrea (Italy)
Assistant Referees: Stefano Pennè (Italy), Simone Boaretto (Italy)
TMO: Carlo Damasco (Italy)
Pool 3
Northampton Saints vs Racing-Métro
Referee: Nigel Owens (Wales)
Assistant Referees: Gwyn Morris (Wales), Wayne Davies (Wales)
TMO: Derek Bevan (Wales)
Scarlets vs Glasgow Warriors
Referee: Pascal Gauzère (France)
Assistant Referees: Maxime Chalon (France), Jean-Luc Rebollal (France)
TMO: Bruno Bessot (France)
Pool 4
Stade Français vs Benetton Treviso
Referee: Greg Garner (England)
Assistant Referees: Dean Richards (England), Kevin Stewart (England)
TMO: David Sainsbury (England)
Leicester Tigers vs Munster
Referee: Jérôme Garcès (France)
Assistant Referees: Thomas Charabas (France), Salem Attalah (France)
TMO: Jean-Marie Piraveau (France)
Pool 5
Leinster vs Toulon
Referee: Wayne Barnes (England)
Assistant Referees: Tim Wigglesworth (England), Paul Dix (England)
TMO: Graham Hughes (England)
Bath vs Wasps
Referee: Romain Poite (France)
Assistant Referees: Cyril Lafon (France,) Stéphane Boyer (France)
TMO: Eric Gonthier (France)
Challenge Cup, Round 4
Pool 1
Brive vs Enisei-STM
Stade Amédée-Domenech
Referee: Gary Conway (Ireland)
Assistant Referees: Eddie Hogan-O'Connell (Ireland), Richard Kerr (Ireland)
Newcastle Falcons vs Connacht
Referee: Ben Whitehouse (Wales)
Assistant Referees: Sean Brickell (Wales), Greg Morgan (Wales)
Pool 2
Sale Sharks vs Castres
AJ Bell Stadium
Referee: Dudley Phillips (Ireland)
Assistant Referees: Mark Patton (Ireland), Paul Haycock (Ireland)
Pau vs Newport Gwent Dragons
Stade Municipal du Hameau
Referee: Andrew Brace (Ireland)
Assistant Referees: Frank Murphy (Ireland), Brian MacNeice (Ireland)
TMO: Kevin Beggs (Ireland)
Pool 3
Montpellier vs Cardiff Blues
Referee: Ian Tempest (England)
Assistant Referees: Greg Macdonald (England), Andrew Watson (England)
TMO: Trevor Fisher (England)
Harlequins vs Calvisano
Referee: Tual Trainini (France)
Assistant Referees: Nicolas Datas (France), Bruno Gabaldon (France)
Pool 4
Zebre vs La Rochelle
Referee: Lloyd Linton (Scotland)
Assistant Referees: Cammy Rudkin (Scotland), Bob Nevins (Scotland)
Gloucester vs Worcester Warriors
Referee: Ian Davies (Wales)
Assistant Referees: Simon Rees (Wales), Martyn Lewis (Wales)
TMO: Gareth Simmonds (Wales)
Pool 5
Edinburgh vs London Irish
Murrayfield
Referee: David Wilkinson (Ireland)
Assistant Referees: Kieran Barry (Ireland), Barrie O'Connell (Ireland)
Grenoble vs Agen
Referee: Tom Foley (England)
Assistant Referees: Craig Maxwell-Keys (England), Nigel Carrick (England)
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