Saracens ended Harlequins 100 per cent Aviva Premiership record with a 19-11 victory in front of 82,000 fans at Twickenham on Tuesday.
USA fullback Chris Wyles came on as a sub in the match at halftime.
A try from David Strettle and 14 points from the boot of Owen Farrell gave Sarries a hard earned victory against the league leaders.
The visitors led 19-6 at the break after capitalising on Quins indiscipline and forcing the home side into errors while in the second half.
The result didn't put Saracens into 1st place. Saracens is now at 9-2, five points behind 10-1 Harlequins. But it did cement these two teams as tghe two best in the Premiership.
The crowd at Twickenham easily set a record for the most to see a single Premiership match. The game helped bump the Aviva Premiership over the 12,000 mark for average attendance (it was 11,442 leading into Tuesday's match and is now 12.511).
The Premiership attendance figures count the 55,437 that saw two matches at Twickenham September 3 twice. Saracens also played at Twickenham on that day and continue to draw exceptionally well away from their home stadium, Vicarage Road.