He said: "The boys are gutted. We ran the legs off ourselves.
"We didn't start particularly well and gave away a couple of soft penalties but we reacted well and could have won.
"Once we find that extra inch we will start winning these games."
Sean Lineen, the Glasgow coach, added: "I'm proud of the guys, especially the second-half performance, but we just gave ourselves too much to do.
"We're sitting in the dressing room knowing we could have beaten one of the form teams in Europe."