Northampton: 15 Ben Foden, 14 Chris Ashton, 13 Jon Clarke, 12 James Downey, 11 Paul Diggin, 10 Stephen Myler, 9 Lee Dickson, 8 Roger Wilson, 7 Tom Wood, 6 Phil Dowson, 5 Christian Day, 4 Courtney Lawes, 3 Brian Mujati, 2 Dylan Hartley (capt), 1 Soane Tonga'uiha.
Replacements: 16 Brett Sharman, 17 Regardt Dreyer, 18 Tom Mercey, 19 Mark Sorenson, 20 Calum Clark, 21 Ryan Powell, 22 Shane Geraghty, 23 Joe Ansbro.
Harlequins: 15 Mike Brown, 14 Tom Williams, 13 George Lowe, 12 Jordan Turner-Hall, 11 Ugo Monye, 10 Nick Evans, 9 Danny Care, 8 Nick Easter, 7 Chris Robshaw (capt), 6 Tom Guest, 5 George Robson, 4 Ollie Kohn, 3 James Johnston, 2 Matt Cairns, 1 Joe Marler.
Replacements: 16 Chris Brooker, 17 Mark Lambert, 18 John Andress, 19 Tomas Vallejos, 20 Will Skinner, 21 Karl Dickson, 22 Rory Clegg, 23 Tom Casson.