Centre Jon Clarke is recalled to the starting line-up for Worcester as they face London Wasps in the Aviva Premiership on Friday.
Clarke replaces Josh Matavesi who moves to the replacements bench as Head Coach Richard Hill makes a total of four changes to this side. Neil Best is named at blindside flanker and will partner Matt Kvesic and Blair Cowan in the back row.
Chris Pennell returns to wear the No.15 jersey with Errie Claassens ruled out after being given a one game ban following his red card at Gloucester last week. With Pennell moving to full back, Josh Drauniniu is named on the wing.
Meanwhile, there are four changes from the London Wasps side that lost to London Irish last weekend, split evenly with two in the backline and two in the pack.
In the backs, Andrea Masi returns from international duty with Italy to take his place at outside centre, pushing Elliot Daly to the wing to replace Christian Wade, who picked up a knock last weekend.
The other back change is a straight swap at fly-half, with Nick Robinson given the starting ten shirt and Stephen Jones named among the replacements.
The two changes to the forwards both come in the front row. Both Tim Payne and Phil Swainston return to the starting lineup for Friday night's game, replacing Zak Taulafo and Will Taylor, who both take places on the bench.
James Haskell is not available for selection having not been able to train this week due to a leg strain.
Worcester Warriors: 15 Errie Claassens, 14 Chris Pennell, 13 Alex Grove, 12 Jon Clarke, 11 David Lemi, 10 Andy Goode, 9 Jonny Arr, 8 Blair Cowan, 7 Matt Kvesic, 6 Neil Best, 5 Dean Schofield, 4 James Percival (c), 3 Euan Murray, 2 Ed Shervington, 1 Matt Mullan.
Replacements: 16 Aleki Lutui, 17 Ceri Jones, 18 John Andress, 19 Craig Gillies, 20 Sam Betty, 21 Paul Hodgson, 22 Danny Gray, 23 Josh Matavesi.
Wasps: 15 Hugo Southwell (c), 14 Elliot Daly, 13 Andrea Masi, 12 Chris Bell, 11 Tom Varndell, 10 Nick Robinson 9 Joe Simpson, 8 Sam Jones, 7 Jonathan Poff, 6 Ashley Johnson, 5 Marco Wentzel, 4 James Cannon, 3 Phil Swainston, 2 T Rhys Thomas, 1 Tim Payne.
Replacements: 16 Tom Lindsay, 17 Zak Taulafo , 18 Will Taylor, 19 Alex Rae, 20 Matt Everard, 21 Stuart Commins, 22 Stephen Jones, 23 Charlie Hayter.
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