Referees to 24 May 2015

Crunch time becomes more nerve-wracking with knock-out matches to find out who wins, cup or promotion, or who avoids or suffers relegation.

Europe is in the thrall of this process with semifinals in England's premiership, last league round of the Top 14 and semifinals in the complicated Pro D2 in France and the semi-finals of the Pro 12 which was born out of the Celtic League.

For some it is a tense time of hope while for most it is a disappointing time of dashed hopes.

International

European Nations Cup

Division 1B

Ukraine vs Netherlands in Odessa

Referee: Patrick Péchambert (France)

Assistant referees: Mourad Zitouni (France), Ludovic Cayre (France)

Division 2D

Finland vs Turkey in Helsinki

Referee: Kacper Michalkiewicz (Poland)

Norway vs Bulgaria in Bergen

Referee: Rami Aro (Sweden)

CONSUR Cup

Paraguay vs Argentina in Asunción

Referee: Federico Cuesta

Assistant referees: Rodrigo Puelma (Chile), Victor Silvero (Paraguay)

Asia Rugby Championship

Japan vs Hong Kong at Aberdeen Stadium in Hong Kong

Referee: Chris Linwood (United Arab Emirates)

Assistant referees: Norman Drake (United Arab Emirates), tba

Coach: Hugh Watkins (Hong Kong)

Division 3

Uzbekistan vs Pakistan at Dustlik Stadium, Tashkent

Referee: tba

Friendly

Uruguay vs Fiji in Montevideo, Uruguay

Referee: Juan Sylvestre (Argentina)

Assistant referees: Jason Mola (Argentina), Esteban Filipanics (Argentina)

Unmder-20

World Rugby Trophy

Georgia vs Portugal at CAR Rugby do Jamor, Lisbon

Namibia vs Hong Kong at Estadio Universitario, Lisbon

Fiji vs Uruguay at CAR Rugby do Jamor, Lisbon

Referees: Damian Schneider (Argentina), Nori Hashimoto (Japan), Aminiasi Tadrau (Fiji), Paulo Duarte (Portugal), Iñigo Atorrasagasti (Spain)

Assistant referees: Ricardo Sant'Anna (Brazil), Tevita Rokovereni (Fiji), Ionut Bodea (Romania).

Friendly

Scotland vs Wales at Murrayfield

Referee: Sam Grove-White (Scotland)

Women

Women's Asian Four Nations

Japan vs Singapore at Aberdeen Sports Ground, Hong Kong

Referee: Gabriel Lee Wing Yi (Hong Kong)

Assistant referees: Patrick Kwok Tsz Kin (Hong Kong), Matthew Rodden (Hong Kong)

Coach: Paul Thevaraj Arulappen (Malaysia)

Kazakhstan vs Hong Kong at Aberdeen Sports Ground, Hong Kong

Referee: Supaporn Gomenake (Thailand)

Assistant referees: Matthew Rodden (Hong Kong), Patrick Kwok Tsz Kin, (Hong Kong)

Coach: Paul Tlhevaraj Arulappen (Malaysia)

Japan vs Hong Kong at Aberdeen Sports Ground, Hong Kong

Referee: Supaporn Gomenake (Thailand)

Assistant referees: Matthew Rodden (Hong Kong), Patrick Kwok Tsz Kin (Hong Kong)

Coach: Paul Thevaraj Arulappen (Malaysia)

Kazakhstan vs Singapore at Aberdeen Sports Ground, Hong Kong

Referee: Gabriel Lee Wing Yi (Hong Kong)

Assistant referees: Patrick Kwok Tsz Kin (Hong Kong), Matthew Rodden (Hong Kong)

Coach: Paul Thevaraj Arulappen (Malaysia)

Kazakhstan vs Japan at Aberdeen Sports Ground, Hong Kong

Referee: Gabriel Lee Wing Yi (Hong Kong)

Assistant referees: Matthew Rodden (Hong Kong), Patrick Kwok Tsz Kin (Hong Kong)

Coach: Paul Thevaraj Arulappen (Malaysia)

Singapore vs Hong Kong at Aberdeen Sports Ground, Hong Kong

Referee: Supaporn Gomenake (Thailand)

Assistant referees: Patrick Kwok Tsz Kin (Hong Kong), Matthew Rodden, (Hong Kong)

Coach: Thevaraj Arulappen (Malaysia)

Super Rugby, Round 15

Chiefs vs Bulls at Rotorua International Stadium, Rotorua

Referee: Chris Pollock (New Zealand)

Assistant referees: Glen Jackson (New Zealand), Aki Aso (Japan)

Television match official: Glenn Newman (New Zealand)

Reds vs Sharks at Suncorp Stadium, Brisbane

Referee: Angus Gardner (Australia)

Assistant referees: Matt O'Brien (Australia), Damien Mitchelmore (Australia)

Television match official: Peter Marshall (Australia)

Blues vs Hurricanes at Eden Park, Auckland

Referee: Nick Briant (New Zealand)

Assistant referees: Ben O'Keeffe (New Zealand), Aki Aso (Japan)

Television match official: Aaron Paterson (New Zealand)

Waratahs vs Crusaders at ANZ Stadium, Sydney

Referee: Marius van der Westhuizen (South Africa)

Assistant referees: James Leckie (Australia), Michael Hogan (Australia)

Television match official: Peter Marshall (Australia)

Force vs Highlanders at nib Stadium, Perth

Referee: Andrew Lees (Australia)

Assistant referees: Rohan Hoffmann (Australia), Graham Cooper (Australia)

Television match official: Ian Smith (Australia)

Cheetahs vs Lions at Free State Stadium, Bloemfontein

Referee: Jaco van Heerden (South Africa)

Assistant referees: Jaco Peyper (South Africa), Lourens van der Merwe (South Africa)

Television match official: Marius Jonker (South Africa)

Stormers vs Rebels at Newlands

Referee: Stuart Berry (South Africa)

Assistant referees: Quinton Immelman (South Africa), Rodney Boneparte (South Africa)

Television match official: Deon van Blommestein (South Africa)

Pro 12 Semifinals

Glasgow Warriors vs Ulster at Scotstoun Stadium

Referee: George Clancy (Ireland)

Assistant referees: Johnny Lacey (Ireland), Dudley Phillips (Ireland)

Television match official: Seamus Gallagher (Ireland)

Munster vs Ospreys at Thomond Park

Referee: Nigel Owens (Wales)

Assistant referees: Leighton Davies (Wales), Ian Davies (Wales)

Television match official: Gareth Simmonds (Wales)

Timekeeper: Louis Cunningham (Ireland)

European Professional Club Rugby

Play-off

Gloucester vs Connacht

Referee: Romain Poite

Assistant referees: tba (France)

Television match official: tba (France)

Timekeeper: Laurie Bryant

Domestic

England

Premiership semifinals

Northampton Saints vs Saracens

Referee: Gregory Garner

Assistant referees: Luke Pearce, Matthew Carley

Television match official: Sean Davey

Timekeeper: Mike Hamlin

Assessor: Nigel Yates

Bath vs Leicester Tigers

Referee: JP Doyle

Assistant referees: Paul Dix, Ashley Rowden

Television match official: Graham Hughes

Timekeeper: Matthew Peters

Assessor: Gary Welsh

France

Top 14, Round 26

Bayonne vs La Rochelle at Stade Jean Dauger

Referee: Salem Attalah

Assistant referees: Stéphane Boyer, Thomas Déjean

Television match official: Philippe Bonhoure

Brive vs Stade Français at Stade Amédée Domenech

Referee: Mathieu Raynal

Assistant referees: Mathieu Noirot, Laurent Breil

Television match official: Eric Gonthier

Lyon vs Grenoble Matmut Stadium

Referee: Jérôme Garcès

Assistant referees: Mathieu Delpy, Christophe Malterre

Television match official: Eric Gauzins

Montpellier vs Clermont Auvergne at Altrad Stadium

Referee: Pascal Gauzère

Assistant referees: David Rosich, Jean-Luc Rebollal

Television match official: Bernard Dal Maso

Racing-Métro vs Castres at Stade Yves Du Manoir

Referee: Maxime Chalon

Assistant referees: Julien Castaignède, Jacques De Lemos

Television match official: Gilles Cogne

Toulon vs Oyonnax at Stade Mayol

Referee: Laurent Cardona

Assistant referees: Christophe Mallet, Eric Soulan

Television match official: Jean-Pierre Pellaprat

Toulouse vs Bordeaux-Bègles at Stade E. Wallon

Referee: Alexandre Ruiz

Assistant referees: Nicolas Datas, Laurent Sclafer

Television match official: Vincent Azoulay

Pro D2 Semifinals

Mont-de-Marsan vs Albi at Stade Municipal Guy Boniface

Referee: Salem Attalah

Assistant referees: Maxime Chalon, Laurent Sclafer

Television match official: Jean-Marie Piraveau

Perpignan vs Agen at Stade Aime Giral

Referee: Cyril Lafon

Assistant referees: Laurent Cardona, Patrick Beuriot

Television match official: Daniel Irazoqui

South Africa

Vodacom Cup Semifinals

Golden Lions vs Pumas at Ellis Park, Johannesburg

Referee: Francois Pretorius

Assistant referees: Stephan Geldenhuys, Renier Vermeulen

Television match official: Johan Greeff

Assessor: Willie Roos

Western Province vs Blue Bulls at Newlands

Referee: Lesego Legoete

Assistant referees: Quinton Immelman, Rodney Boneparte Rodney

Television match official: Deon van Blommestein

Assessor: Dennis Immelman

Classic Clashes

Ndzondelelo vs Itembelihle in Zwide, Port Elizabeth

Referee: Rodney Boneparte

Assistant referees: Local

Assessor: Jacques Hugo

DHS vs Glenwood in Durban

Referee: Ruaan du Preez

Assistant referees: Local

Assessor: Pierre Oelofse

Klerksdorp vs Lichtenburg in Klerksdorp

Referee: Renier Coetzee

Assistant referees: Local

Assessor: Keith Hendricks

Eldoraigne vs Zwartkop Pretoria

Referee: Jacques Nieuwenhuis

Assistant referees: Local

Assessor: Dennis Immelman

Humansdorp vs Pearson/Woodridge in Humansdorp

Referee: Ruhan Meiring

Assistant referees: Local

Assessor: Thuso Mngqibisa