Dempsey returns as Glasgow change five for Quins trip
Glasgow Warriors head coach Franco Smith has made five changes from the win over Racing 92 for Saturday's Champions Cup match at Harlequins.
Euan Ferrie replaces Gregor Brown in the second row, while Jack Dempsey makes his first club appearance since October, preferred to Jack Mann at number eight.
In the backs, Jamie Dobie comes in for George Horne at scrum-half, and there are starts for Stafford McDowall and Kyle Rowe in place of Sione Tuipulotu and Kyle Steyn.
Glasgow could still top Pool 4 and secure a home quarter-final should they get there, but need to better Toulon's result against Sale on Sunday.
"We know that Harlequins will pose probably our toughest test of the pool stage tomorrow night," Smith said.
"They have proved against the Stormers that they are an incredibly difficult team to beat at home, so we need to continue our own progress and focus on our own performance.
"They also have a proud record in front of their home supporters, and we look forward to the challenge that awaits us tomorrow night."
Glasgow XV to face Harlequins: McKay, Cancelliere, Jones, McDowall, Rowe, Jordan, Dobie; Sutherland, Matthews, Z. Fagerson, Ferrie, Cummings, M. Fagerson, Darge, Dempsey.
Replacements: Hiddleston, Bhatti, Talakai, Samuel, Brown, Venter, Afshar, Weir.