Head coach Lyn Jones has praised Gordon Ross’s contribution to London Welsh.
The fly half makes his 100th appearance today, with Jones commenting: “One hundred appearances for any club is a huge achievement and honour, and Gordon fully deserves this accolade with London Welsh.
“He’s been a model professional.”
Ross is one of nine changes to the side beaten 39-17 by Stade Francais last weekend.
Tom Voyce and Sonny Parker also come into the backs, while Paulica Ion starts at tight head and Tom Bristow at loosehead.
On the bench, there’s a return from injury for Martin Purdy and Daniel Browne, and a place for Neath scrum half Luc Jones – son of Lyn – who joins the club on loan. With ten players away on international duty, Harlequins field an unfamiliar side.
Harlequins: Lindsay-Hague, Stegmann, Hopper, Casson, Smith, Botica, Dickson, Lambert, Ward, Collier, Twomey, Matthews, Trayfoot, Wallace (capt), Guest. Reps: Allen, Marfo, Sinckler Clifford, Sloan, Burns, Grimoldby, Chisholm.
London Welsh: Voyce*, Scott, Parker*, Jewell, MacKenzie*, Ross*, Davies, Bristow, George, Ion*, Brown, Kulemin*, Jackson (capt), Hills, Balding. Reps: Evans, Moss, Tideswell, Purdy, Browne, Jones, Ajuwa, Arscott. *international.