Northampton
15 Ben Foden
14 Chris Ashton
13 Jon Clarke
12 James Downey
11 Bruce Reihana
10 Shane Geraghty
9 Lee Dickson
1 Soane Tonga'uiha
2 Dylan Hartley (capt)
3 Brian Mujati
4 Courtney Lawes
5 Christian Day
6 Phil Dowson
7 Tom Wood
8 Roger Wilson
Replacements
16 Brett Sharman
17 Regardt Dreyer
18 Euan Murray
19 Calum Clark
20 Mark Easter
21 Ryan Powell
22 Stephen Myler
23 Joe Ansbro
Castres
1 Yannick FORESTIER
2 Matthieu BONELLO
3 Daniel SAAYMAN
4 Scott MURRAY
5 Iosefa TEKORI
6 Ibrahim DIARRA
7 Yannick CABALLERO
8 Christopher MASOE (C)
9 Sébastien TILLOUS BORDE
10 Cameron MCINTYRE
11 Vincent INIGO
12 Romain CABANNES
13 Pierre- Manuel GARCIA
14 Romain MARTIAL
15 Pierre BERNARD
Subs:
16 Benjamin KAYSER
17 Michaël COETZEE
18 Anton PEIKRISHVILI
19 Matthias ROLLAND
20 Jan De Bruin BORNMAN
21 Thomas SANCHOU
22 Seremaia BAIKEINUKU
23 Marc ANDREU
Very strong Saints team (the proverbial "cup final" team), but Chris Masoe and Scott "Red Card" Murray, I don't recodnise anyone in the XV. Surprised Kayser isn't starting.