Ryan Wilson went over for Glasgow's third try

Both teams progress in the competition was already secured and they look likely to meet again at the quarter-final stage.

Glasgow's points all came in the first half with tries by Tommy Seymour, Ali Price and Ryan Wilson - with two conversions by Adam Hastings - as they went in 24-19 down at the break.

Warriors did have periods of pressure early in the second half but mistakes and the referee's whistle meant they came to nothing.

Saracens added another two scores in the last quarter to secure top seeding and a home quarter-final.

Saracens made a quick start going 10-0 ahead with scrum-half Ben Spencer scoring all the points with a penalty and conversion of his own try.

The score was aided by poor defending as Dave Strettle slipped between Grant Stewart and Adam Hastings before offering Spencer a simple run-in.

Glasgow issued a dynamic response when superb hands from the line-out sent Tommy Seymour galloping over and they surged ahead when a charged down kick fell for Ali Price, who darted across the whitewash from 20 metres.

The frantic pace of scoring continued with Vincent Koch finishing off a line-out drive and then Ryan Wilson picked a good line to touch down from short range.

Saracens reasserted themselves once more when Billy Vunipola blasted over from a five-metre scrum which had been awarded when George Kruis had the ball knocked from his hand just short of the line.

The second half was far cagier as the chances dried up at both ends and the tension threatened to boil over in the 58th minute when mass shoving broke out after Saracens had been shunted backwards at a scrum.

Alex Lozowski was wide with a long-range penalty attempt but the decisive blow finally arrived in the 70th minute when a counter attack developed down the right side for Itoje to cross after input from Will Skelton and Billy Vunipola.

Skelton then forced himself over to with the clock on red for a score line that didn't reflect the visitor's contribution to an entertaining encounter.