Northampton will be boosted by the returns of England internationals Dylan Hartley and Courtney Lawes when they visit Worcester at Sixways.
With the Six Nations taking a weekend off, England released those who started on the bench against Ireland meaning both are available for selection.
They join a powerful Saints line-up with other England internationals such as Ben Foden and Lee Dickson included. However, flanker Tom Wood is still absent as he is preserved by England for next weekend's clash against France.
Worcester welcome back fly-half Andy Goode and prop Euan Murray to their starting XV from injury and international duty respectively.
Goode was forced to miss last week's defeat at Bath through illness but is now fit so Danny Gray drops to the bench. Scotland international Murray starts at tight-head prop returning from international duty to face his former side.
Worcester: 15 Errie Claassens, 14 Josh Drauniniu, 13 Alex Grove, 12 Jon Clarke, 11 David Lemi, 10 Andy Goode, 9 Jonny Arr, 8 Matt Kvesic. 7 Sam Betty, 6 Neil Best, 5 Dean Schofield, 4 James Percival (c), 3 Euan Murray, 2 Aleki Lutui, 1 Matt Mullan.
Replacements: 16 Ed Shervington, 17 Ceri Jones, 18 John Andress, 19 Craig Gillies, 20 Jake Abbott, 21 Paul Hodgson, 22 Danny Gray, 23 Josh Matavesi.
Northampton: 15 Ben Foden, 14 James Wilson, 13 George Pisi, 12 Tom May, 11 Jamie Elliott, 10 Stephen Myler, 9 Lee Dickson, 8 GJ van Velze, 7 Phil Dowson, 6 Samu Manoa, 5 Mark Sorenson, 4 Courtney Lawes, 3 Tom Mercey, 2 Dylan Hartley (c), 1 Soane Tonga'uiha.
Replacements: 16 Mike Haywood, 17 Alex Waller, 18 Paul Doran Jones, 19 Rhys Oakley, 20 Ben Nutley, 21 Martin Roberts, 22 Ryan Lamb, 23 Dom Waldouck.
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