Saracens 19 Harlequins 24
A record-breaking crowd saw Harlequins hold off a late Saracens fightback to secure an important victory at Wembley Stadium.
It didn't take Harlequins long to break the deadlock, taking the lead in the 3rd minute courtesy of a Jordan Turner-Hall try, which was converted by Nick Evans.
But Quins' indiscipline would cost them their early advantage, as three Owen Farrell penalties in nine minutes turned the score line on its head and handed Sarries a narrow lead.
The ding-dong battle went up another gear just after the end of the first quarter as George Lowe put Quins back in front with a well taken try. Nick Evans' second conversion made it 14-9.
The huge Wembley crowd were lapping up the entertainment on offer but they'd have to wait more than half an hour to see the game's next try.
Farrell's fourth penalty on the stroke of half-time shaved three points off Quins' advantage, but the Premiership pace-setters were dominant during a pivotal opening 20 minutes following the restart.
Rory Clegg's penalty on 45 minutes stretched Harelquins lead back out to five, before Danny Care crossed for a crucial try, converted by Clegg, just before the hour.
There was still time for Saracens to stage a fightback, however, and, after Joe Marler and Danny Care were sent to the sin-bin, Richard Wigglesworth's converted try set up a grandstand finish.
With Harlequins down to 14 men for the final ten minutes, Sarries rallied forward in search of a crucial second try.
Clegg wasted the opportunity to boot his side to safety, and the leaders lost a third player, Nick Easter, to the sin-bin, but it mattered little in the end as Harlequins held on for the win.