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The only change is on the bench with Martin Purdy coming in for George Skivington. The game, which is a 10'000 sell-out, brings together the only two English teams left in the competition.
Gatland said, "There is no doubt that this is the one to be watching but it is a pity there will only be one English club making the semi-finals. Wasps and Gloucester have a healthy rivalry, which makes for an exciting build up and great game for everyone. We have an enormous amount of respect for them knowing they have some dangerous players.
Wasps have never gone beyond this stage of the competition and we hope to progress further".
Injuries to Peter Richards (Knee), Jonny O' Connor (Achilles) and Phil Greening (Foot) have ruled them out for selection. Richards injured his knee during the recent IRB Seven series in Singapore. The scrumhalf has soft tissue damage around the left knee and could miss the next three weeks.
London Wasps: M Van Gisbergen; J Lewsey, F Waters, S Abbott, T Voyce; A King, R Howley; C Dowd, T Leota, W Green, S Shaw, R Birkett, J Worsley, P Volley, L Dallaglio (capt)
Replacements: T Payne, M Lock, B Gotting, M Purdy, H Biljon, M Denney, A Erinle,
Gloucester: TBC
Referee: Joel Jutge (France)
