Cardiff v Harlequins, Arms Park (8.0):Dai Young's side will look to continue their momentum to the knock-out stages by overcoming Harlequins and following up on an excellent 31-21 victory over Stade Francais in Cardiff last time out.

The English side make seven changes to the team that started against Leicester at the weekend. Simon Keogh, who came on as a replacement that day, hasn't made the bench. The Welsh side to maintain their run.

CARDIFF BLUES:B Blair; J Roberts, T Shanklin, D Hewitt, G Thomas; N MacLeod, J Spice; G Jenkins, G Williams, T Filise, D Jones, P Tito, M Molitika, M Williams, X Rush (capt). Replacements: J Yapp, D Goodfield, S Morgan, M Lewis, R Rees, R Jones, J Robinson.

HARLEQUINS:M Brown; D Strettle, H Luscombe, D Barry, T Williams; C Malone, S So'oialo; C Jones, G Botha, M Ross, J Percival, N Spanghero, T Guest, P Volley (capt), C Hala'Ufia. Replacements: T Fuga, R Nebbett, O Kohn, P Davies, D Care, A Jarvis, T Masson.

Referee:Romain Poite (France).

Stade Francais v Bristol, Stade Jean Bouin (8.0)

Pre-tournament favourites Stade Francais have to win. It's no foregone conclusion as Bristol demonstrated when they beat Stade 17-0 at the Memorial Stadium, but the Parisians have only lost to one team (Munster) at home in their European Cup history. David Skrela and Boela Du Plooy face late fitness tests. Brian O'Riordan starts at scrumhalf for Bristol.

STADE FRANÇAIS:I Corleto; J Arias, S Glas, M Bastareaud, C Dominici (capt); D Skrela, A Albouy; D Attoub, D Szarzewski, R Roncero, J Du Plooy, P Pape, P Rabadan, R Martin, S Parisse. Replacements: D Weber, F Montanella, A Marchois, M Bergamasco, J Fillol, L Beauxis, M Bergamasco.

BRISTOL:L Arscott; T Arscott, R Higgitt, N Brew, D Lemi; J Strange, B O'Riordan; D Crompton, M Regan, J Hobson, R Winters, S Hohneck, M Salter (capt), J El Abd, A Blowers. Replacements: S Linklater, A Clarke, D Attwood, A To'oala, R Pennycook, G Beveridge, D Hill.

Referee:George Clancy (Ireland).