Here are the referees, ARs and TMO for the first of two weekends of European rugby action.
As players and referees build towards the Six Nations, we have the host of familiar names in action around the various European matches. Luke Pearce from England (left) will oversee the two most successful clubs in European rugby history who go head-to-head. Leinster will entertain fellow four-time tournament winners, Toulouse. John Lacey will have his hands full in France as Clermont play host to the Northampton Saints.
A few new names to keep an eye on. Karl Dickson referees his first European Challenge Cup match – a French derby as Perpignan play Bordeaux Bègles. Over in Russia, Enisei-STM host Bristol Bears – and will be overseen by a Georgian team of three with referee, Nika Amashukeli (above right) taking the whistle.
Enjoy whatever it is you’re involved in this weekend
Champions Cup – Round 5
Gloucester Rugby v Munster Rugby
Referee: Romain Poite (FRA)
ARs: Cyril Lafon (FRA) & Stephane Boyer (FRA)
TMO: Denis Grenouillet (FRA)
Citing Officer: John Montgomery (SCO)
Leinster Rugby v Toulouse
Referee: Luke Pearce (ENG)
ARs: Tom Foley (ENG) & Jonathan Healy (ENG)
TMO: Graham Hughes (ENG)
Citing Officer: Maurizio Vancini (ITA)
Montpellier v Newcastle Falcons
Referee: Marius Mitrea (ITA)
ARs: Andrea Piardi (ITA) & Vincenzo Schipani (ITA)
TMO: Stefanno Penne (ITA)
Citing Officer: Stefano Marama (ITA)
Bath Rugby v Wasps
Referee: Ben Whitehouse (WAL)
ARs: Craig Evans (WAL) & Wayne Davies (WAL)
TMO: Ian Davies (WAL)
Citing Officer: Tim Lowry (IRE)
Ulster Rugby v Racing 92
Referee: Mathew Carley (ENG)
ARs: Andrew Jackson (ENG) & Wayne Falla (ENG)
TMO: Geoff Warren (ENG)
Citing Officer: John Byett (ENG)
Scarlets v Leicester Tigers
Referee: Mathieu Raynal (FRA)
ARs: Thomas Charabas (FRA) & Vincent Blasco (FRA)
TMO: Andrew MacPherson (SCO)
Citing Officer: Francesco Grillo (ITA)
RC Toulon v Edinburgh Rugby
Referee: Wayne Barnes (ENG)
ARs: Anthony Woodthorpe (ENG) & Simon McConnell (ENG)
TMO: Rowan Kitt (ENG)
Citing Officer: Paul Hull (ENG)
Exeter Chiefs v Castres Olympique
Referee: George Clancy (IRE)
ARs: Sean Gallagher (IRE) & Mark Patton (IRE)
TMO: Olly Hodges (IRE)
Citing Officer: Eddie Walsh (IRE)
Glasgow Warriors v Cardiff Blues
Referee: JP Doyle (ENG)
ARs: John Meredith (ENG) & Phil Watters (ENG)
TMO: David Grashoff (ENG)
Citing Officer: Murray Whyte (IRE)
Lyon v Saracens
Referee: Andrew Brace (IRE)
ARs: Joy Neville (IRE) & Nigel Correll (IRE)
TMO: Simon McDowell (IRE)
Citing Officer: Peter Ferguson (IRE)
Challenge Cup – Round 5
Dragons v Timisoara Saracens
Referee: Ludovic Cayre (FRA)
ARs: Jonathan Dufort (FRA) & Nicolas Datas (FRA)
Citing Officer: James Hall (ENG)
Perpignan v Bordeaux Bègles
Referee: Karl Dickson (ENG)
ARs: Christophe Ridley (ENG) & Michael Patz (ENG)
Citing Officer: Wayne Sheridan (IRE)
La Rochelle v Zebre Rugby Club
Referee: Craig Maxwell-Keys (ENG)
ARs: Neil Chivers (ENG) & Paul Dix (ENG)
TMO: Trevor Fisher (ENG)
Citing Officer: Paul Minto (SCO)
Stade Francais Paris v Pau
Referee: Dan Jones (WAL)
ARs: Dewi Phillips (WAL) & Ben Breakspear (WAL)
Citing Officer: Alberto Recaldini (ITA)
Enisei-STM v Bristol Bears
Referee: Nika Amashukeli (GEO)
ARs: Tornike Gvirjishvili (GEO) & Irakli Tchanukvadze (GEO)
Citing Officer: Roberto Carra (ITA)
Ospreys v Worcester Warriors
Referee: Alexandre Ruiz (FRA)
ARs: Laurent Cardona (FRA) & Luc Ramos (FRA)
Citing Officer: Patrice Frantschi (FRA)
Connacht Rugby v Sale Sharks
Referee: Pierre Brousset (FRA)
ARs: Adrien Descottes (FRA) & Flavien Hourquet (FRA)
Citing Officer: John Charles (WAL)
Harlequins v FC Grenoble
Referee: Mike Adamson (SCO)
ARs: Lloyd Linton (SCO) & David Sutherland (SCO)
Citing Officer: Paul Thomas (WAL)
Benetton Rugby v Agen
Referee: Ben Blain (SCO)
ARs: Finlay Brown (SCO) & Hollie Davidson (SCO)
TMO: Neil Patterson (SCO)
Citing Officer: Beth Dickens (SCO)
ASM Clermont v Northampton Saints
Referee: Johnny Lacey (IRE)
ARs: Frank Murphy (IRE) & Jonny Erskine (IRE)
TMO: Brian MacNeice (IRE)
Citing Officer: Richard McGhee (SCO)
Continental Shield – Round 5
RC Locomotive Tbilisi v G.S. Fiamme Oro Rugby
Referee: Sara Cox (ENG)
ARs: George Selwood (ENG) & Clare Daniels (ENG)
Argos Petrarca Rugby v Femi-CZ Rugby Rovigo Delta
Referee: Shota Tevzadze (GEO)
ARs: Ilia Mzhavanadze (GEO) & Onise Mogelashvili (GEO)
Greene King Championship – Round 11
London Scottish v Hartpury
Referee: Simon Harding
ARs: Alexander Thomas & Nigel Carrick
Jersey v Nottingham
Referee: Dean Richards
ARs: Matt Turvey & Bill Burton
Bedford v Ealing Trailfinders
Referee:Michael Hudson
ARs: Shane Lewis & Ian Bibey
Coventry v Doncaster
Referee: Tim Wigglesworth
ARs: Fergus Kirby & Darryl Chapman
Yorkshire Carnegie v Cornish Pirates
Referee: Matthew O’Grady
ARs: Gregory Garner & Simon Park
London Irish v Richmond
Referee: Neil Chivers
ARs: Peter Brunt & Nick Marshall