The next 48 hours will decide the quarter-final line-up for the Heineken Cup with none of the seedings already decided. So see below for vital team line-ups for sides like Ulster, Bath, Leicester, Perpignan, Northampton, Toulon, Ospreys, Wasps, Toulouse and London Irish who are fighting for their European lives.

HEINEKEN CUP ROUND 6 – SATURDAY AND SUNDAY MATCHES

SATURDAY

POOL 4

Aironi Rugby v Ulster Rugby

Aironi Rugby: J Laharrague, P Canavosio, R Penney, G Pavan, M Pratichetti, J Marshall, M Wilson, M Aguero, F Ongaro, F Staibano, M Bortolami, Q Geldenhuys [capt], V Liebenberg, J Erasmus, J Sole.

Replacements: R Santamaria, S Perugini, A de Marchi, C del Fava, A Birchall, T Tebaldi, R Bocchino, G Pizarro

Ulster Rugby: A D’Arcy, A Trimble, N Spence, P Wallace, S Danielli, I Humphreys, R Pienaar, T Court, N Brady, D Fitzpatrick, J Muller, D Tuohy, S Ferris, W Faloon, P Wannenburg

Replacements: A Kyriacou, B Young, J Cronin, T Barker, C Henry, P Marshall, I Whitten, D McIlwaine

Referee: Christophe Berdos (France)

Biarritz Olympique Pays Basque v Bath Rugby

Biarritz Olympique Pays Basque: D Haylett-Petty, T Ngwenya, M Bosch, D Traille, I Balshaw, J Peyrelongue, D Yachvili, E Coetzee, B August, S Marconnet, P Taele, E Lund, S Vahafolau, I Harinordoquy [capt], R Lakafia.

Replacements: R Terrain, Y Watremez, E Guinazu, J Thion, B Guyot, Y Lesgourgues, A Mignardi, I Bolakoro

Bath Rugby: N Abendanon, M Banahan, O Barkley, S Hape, T Biggs, B James, M Claassens, D Bell, L Mears, D Wilson, S Hooper, D Grewcock, S Taylor, L Watson [capt], B Skirving

Replacements: P Dixon, D Flatman, A Jarvis, I Fernadez Lobbe, J Ovens, M McMillan, S Vesty, J Cuthbert

Referee: George Clancy (Ireland)

POOL 3

Munster v London Irish

Munster: J Murphy, D Howlett, K Earls, L Mafi, D Hurley, R O’Gara, T O’Leary, W du Preez, D Varley, J Hayes, M O’Driscoll, P O’Connell, D Wallace, N Ronan, D Leamy [capt].

Replacements: M Sherry, D Hurley, T Buckley, D O’Callaghan, J Coughlan, P Stringer, S Deasy, T Gleeson

London Irish: T Ojo, A Thompstone, E Seveali’i, S Mapusua [capt], S Tagicakibau, D Bowden, D Allinson, A Corbisiero, J Buckland, F Rautenbach, N Kennedy, M Garvey, G Stowers, J Gibson, C Hala’ufia

Replacements: B Blaney, D Murphy, P Ion, R Thorpe, K Roche, M Watson, R Lamb, P Hodgson

Referee: Peter Allan (Scotland)

Ospreys v Toulon

Ospreys: L Byrne, N Walker, S Parker, J Hook, R Fussell, D Biggar, R Webb, D Jones, R Hibbard, C Mitchell, I Gough, A Jones, R Jones, J Tipuric, J Thomas.

Replacements: H Bennett, R Bevington, C Griffiths, J Collins, M Holah, M Phillips, A Beck, S Williams

Toulon: R Lamont, B Lapeyre, G Messina, M Kefu, T Brana, J Wilkinson, M Henjak [capt], S Taumoepeau, J Genevois, C Hayman, J Suta, D Senekal, O Missoup, T Sourice, F Auelua

Replacements: M Ivaldi, B Basteres, M Merabet, J van Niekerk, J El Abd, T May, L Magnaval, K Chesney

Referee: Wayne Barnes (England)

POOL 1

Edinburgh v Cardiff Blues

Edinburgh: J Thompson, L Jones, B Cairns, N De Luca, S Webster, C Paterson, M Blair, A Jacobsen, R Ford, L Niven, S MacLeod, E Lozada, D Denton, A MacDonald, R Grant [capt].

Replacements: K Traynor, G Cross, D Young, F McKenzie, S McInally, G Laidlaw, R Samson, J King

Cardiff Blues: C Czekaj, L Halfpenny, C Laulala, J Roberts, R Mustoe, D Parks, T Slater, J Yapp, T Thomas, F Filise, D Jones, P Tito [capt], A Pretorius, M Williams, M Molitika

Replacements: G Williams, S Andrews, S Hobbs, B Davies, B White, C Sweeney, D Hewitt, T James

Referee: Pascal Gauzere (France)

Castres Olympique v Northampton Saints

Castres Olympique: F Denos, M Nicolas, Y Audrin, P Garcia, V Inigo, P Bernard, S Tillous-Borde, M Coetzee, B Kayser, D Saayman, S Murray, R Capo Ortega, C Masoe [capt], S Malonga, J Bornman.

Replacements: A Giorgadze, A Peikrishvili, L Ducalcon, J Tekori, G Adamou, A Albouy, S Bai, R Martial

Northampton Saints: B Foden, J Ansbro, J Clarke, J Downey, P Diggin, S Myler, R Powell, S Tongauiha, D Hartley [capt], B Mujati, C Clark, M Sorenson, P Dowson, T Wood, R Wilson

Replacements: B Sharman, A Waller, T Mercey, C Day, M Easter, S Commins, S Geraghty, B Reihana

Referee: Peter Fitzgibbon (Ireland)

SUNDAY

POOL 5

Leicester Tigers v Benetton Treviso

Leicester Tigers: S Hamilton, M Smith, M Tuilagi, A Allen, A Tuilagi, T Flood, B Youngs, M Ayerza, G Chuter, D Cole, L Deacon [capt], G Skivington, T Waldrom, C Newby, J Crane.

Replacements: R Hawkins, B Stankovich, M Castrogiovanni, E Slater, S Mafi, J Grindal, J Staunton, H Agulla

Benetton Treviso: B Williams, L Nitoglia, E Galon, G Garcia, J Maddock, K Burton, F Semenzato, M Rizzo, L Ghiraldini [capt], L Cittadini, E Pavanello, C van Zyl, B Vermaak , V Bernabò, P Derbyshire

Replacements: F Sbaraglini, I Fernandez Rouyet, P di Santo, A Pavanello, A Zanni, A Sgarbi, T Botes, T Benvenuti

Referee: Romain Poite (France)

Perpignan v Scarlets

Perpignan: J Porical, F Sid, D Marty, M Mermoz, J Candelon, N Laharrague, F Cazenave, P Freshwater, G Guirado, N Mas [capt], O Olibeau, G Vilaceca, D Chouly, B Guiry, H Tuilagi.

Replacements: M Tincu, K Pulu, B Bourrust, R Tchale Watchou, D Mele, G Britz, O Tonita, J Michel

Scarlets: R Priestland, M Stoddart, G Maule, J Davies, S Lamont, S Jones, T Knoyle, I Thomas, M Rees [capt], A Fenby, L Reed, J Fa’amatuainu, R McCusker, J Turnbull, D Lyons

Replacements: E Phillips, R Jones, P John, D Welch, B Morgan, M Roberts, L Williams, R Pugh

Referee: Dave Pearson (England)

POOL 6

Newport Gwent Dragons v Glasgow Warriors

Newport Gwent Dragons: W Harries, A Hughes, T Riley, A Smith, A Brew, J Tovey, W Evans, P Price, T Willis [capt], B Castle, L Charteris, R Sidoli, D Lydiate, G Thomas, T Faletau.

Replacements: S Jones, G Robinson, P Palmer, S Morgan, L Evans, J Leadbeater, P Leach, M Jones

Glasgow Warriors: B Stortoni, C Shaw, F Aramburu, P Murchie, D van der Merwe, R Jackson, C Gregor, J Welsh, D Hall, M Low, A Muldowney, A Kellock [capt], R Harley, R Vernon, R Wilson

Replacements: F Thomson, R Grant, K Tkachuk, P Burke, C Fusaro, H Pyrgos, P Horne, H O’Hare

Referee: John Paul ‘JP’ Doyle (England)

London Wasps v Toulouse

London Wasps: M van Gisbergen, T Varndell, B Jacobs [capt], D Waldouck, D Lemi, D Walder, J Simpson, T Payne, T Lindsay, Z Taulafo, S Shaw, R Birkett, J Worsley, S Betsen, A Powell.

Replacements: J Ward, C Beech, B Broster, M Veale, J Cannon, N Berry, R Flutey, R Haughton

Toulouse: C Poitrenaud, V Clerc, F Fritz, Y Jauzion, M Medard, D Skrela, J Doussain, D Human, W Servat, C Johnston, Y Maestri, P Albacete, Y Nyanga, T Dusautoir [capt], L Picamoles

Replacements: V Lacombe, J Poux, Y Montes, G Lamboley, N Vergallo, C Heymans, F Michalak, S Sowerby

Toulouse replacement No 22 Frederic Michalak faces a late fitness test. If he is ruled out Jean Bouilhou will take his place on the replacements bench

Referee: Alain Rolland (Ireland)