Harlequins have made three changes to their starting XV for Friday's Aviva Premiership clash with Worcester.
Seb Stegmann replaces the injured Ugo Monye, while James Johnston and Maurie Fa'asavalu return from international duty with Samoa to start at tight head prop and blindside respectively.
Number eight Nick Easter continues as captain, while Charlie Matthews and Tom Casson return from injury and are named among the bench.
Meanwhile, winger David Lemi returns to the starting line-up and Euan Murray is set for his first club appearance for Worcester against Quins.
The other change to the starting line-up sees centre Alex Grove replace the injured Joe Carlisle and partner Josh Matavesi in midfield.
Scotland international prop Murray arrived at Sixways this week and is named on the bench.
Lock James Percival will once again captain the team and is joined in the side be ex-Quins Ceri Jones and John Andress.
Form: Harlequins' six game winning run in all competitions ended at Bath last Friday. The reigning Premiership champions still top the table despite winning just two of their last five games in the competition. Quins only defeat at the Twickenham Stoop this season came to Saracens, 16-18, on 30 September. Worcester Warriors' last six encounters in the Premiership have all been won by the home side on the day, whilst Worcester's solo away victory since New Year's Day came in Spain against Gernika on 13 October. Harlequins have won their last nine fixtures with the Warriors in all competitions. Worcester have won just once at the Stoop in the Premiership: 15-9 on 19 February 2005.
Harlequins: 15 Tom Williams, 14 Seb Stegmann, 13 Matt Hopper, 12 Jordan Turner-Hall, 11 Sam Smith, 10 Nick Evans, 9 Karl Dickson, 8 Nick Easter (c), 7 Luke Wallace, 6 Maurie Fa'asavalu, 5 George Robson, 4 Olly Kohn, 3 James Johnston, 2 Joe Gray, 1 Mark Lambert.
Replacements: 16 Rob Buchanan, 17 Darryl Marfo, 18 Will Collier, 19 Charlie Matthews, 20 Tom Guest, 21 Jordan Burns, 22 Rory Clegg, 23 Tom Casson.
Worcester Warriors: 15 Chris Pennell, 14 Nikki Walker, 13 Alex Grove, 12 Josh Matavesi, 11 David Lemi, 10 Andy Goode, 9 Paul Hodgson, 8 Semisi Taulava, 7 Matt Kvesic, 6 Neil Best, 5 Chris Jones, 4 James Percival (c), 3 John Andress, 2 Ed Shervington, 1 Ceri Jones.
Replacements: 16 Aleki Lutui, 17 Rob O'Donnell, 18 Euan Murray, 19 Dean Schofield, 20 Sam Betty, 21 Jonny Arr, 22 Andy Short, 23 Errie Claassens.
Date: Friday, November 30
Venue: Twickenham Stoop
Referee: Luke Pearce
Assistant referees: Roy Maybank, Ashley Rowden
Timekeeper: John Burtenshaw
Assessor: Ed Morrison