Glasgow reached the quarter-finals of a European tournament for the first time thanks to a closely-fought 6-6 draw at home to Saracens.
There was plenty of tough tackling in terrible conditions
The Warriors finished as one of the better Challenge Cup group runners-up.
Saracens earned a home quarter-final tie by keeping their unbeaten run intact to top Pool Two.
Dan Parks and Glen Jackson each kicked two penalties in a match that went ahead at Glasgow's Hughenden after the pitch survived a late inspection.
Glasgow Warriors: Lamont, O'Hare, Gregor, Henderson, Evans, Parks, Beveridge, Va'a, Thomson, Murray, Newman, Kellock, Swindall, Barclay, Beattie.
Replacements: Pinder for Beveridge (50), Milligan for Thomson (74), Tckachuk for Murray (10), Turner for Newman (68), Wilson for Swindall (65). Not Used: Petrie, Shaw.
Saracens: Scarbrough, Haughton, Sorrell, Powell, Ratuvou, Jackson, de Kock, Yates, Ongaro, Visagie, Fullarton, Raiwalui, Gustard, Hill, Skirving.
Replacements: Cairns for Ongaro (64), Vyvyan for Fullarton (74), Chesney for Gustard (64). Not Used: Mercey, Dickens, De Vedia, Penney.
Ref: David Rosich (France)