The Chiefs start the weekend with one draw and four defeats from their last five league matches - a run of form that has seen them slip down to eighth place in the table.
London Welsh have fared even worse in recent weeks, with five straight losses leaving them three points above the drop zone.
London Welsh: WLLLLL
Exeter: Arscott, Nowell, Naqelevuki, Shoemark, Jess, Steenson, Thomas, Baxter, Scaysbrook, White, Mumm, Hayes, Tui, Yeandle, Rimmer
Replacements: Clark, Moon, Brown, Welch, Ewers, Chudley, Mieres, Dollman
London Welsh: Arscott, MacKenzie, Tiesi, Jewell, Scott, Henson, Keats, Jackson, Cabello Farias, Balding, Corker, Mills, Bateman, Briggs, Montanella
Replacements: George, Bristow, Tideswell, Purdy, Hills, Lewis, Ross, Parker
Sports Mole says: Exeter to sneak the win