Image source, Rex Features

All gone a bit loose towards half-time in this one.

Neither side wanting to hold on to the ball in promising areas and Quins knock on after a mis-placed pass from Sarries.

Big turnover by Saracens inside their own 22 with Maro Itoje and Mako Vunipola heavily involved.

Charlie Walker was nearly in again for a second try to level things up but the Saracens defence had the answers.

Beautiful flowing move from Harlequins almost produces a great try from inside their own half.

Jamie Roberts and Alofa Alofa with the bursts through midfield before James Lang and Tim Visser tried to combine in the corner.

Saracens intercept and survive for now.

Image source, Rex Features

Scrappy passage of play from Saracens' back line almost sees Tim Visser intercept for Quins on the counter.

The home side's prop Will Collier is down getting some treatment after a tough collision with one of his own players.

On comes British & Irish Lion Kyle Sinckler off the bench.

Image source, Rex Features

This one hasn't disappointed so far. Earlier both sets of players even had the chance to feel each other's collars.

No cards shown on that occasion, but that's just a flavour of how keen the contest has been.

Saracens uncharacteristically give away penalties in the opponent's half and allow Quins to get clear.

Elia Elia escapes a loose line-out that his team-mates dive on and Saracens just struggling to keep hold of the ball.

Mike Brown's been in with a couple of half chances to finish off this Quins attack, but as yet, he's not got his name on the scoresheet...

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Quins held up once more over Saracens' line!

Sean Maitland gets his hands in amongst it to prevent Mat Luamanu dotting down.

Another scrum for Quins right in front of the Sarries posts...

A couple of replays there suggest that Elia Elia may well have got that one down over the line for Quins.

James Horwill pleads for Luke Pearce to have a look with the TMO, but he's happy to continue.

Quins will go again from the scrum....

James Horwill nearly there for Quins under the posts...

Mike Brown also has a dart to get over. Quins prop Elia Elia held up over the Saracens line after an absolute bucket-load of phases.

Scrum five for the hosts after that barrage of attacking.

Lots and lots of phases within inches of the Saracens line from Quins doesn't find a way through yet.

Sean Maitland is penalised for Saracens after that concerted spell from the hosts, who for a third time try to get over from a rolling maul...

Big moment for Quins from a five-metre line-out and then a penalty awarded from the maul.

Might be a yellow card coming if Sarries get themselves in trouble again there with Luke Pearce.

Can Quins force one over in the corner?

Been quite a few big collisions already like this one between Chris Robshaw and Jackson Wray....

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Meanwhile, there's a full-on brawl developing after the whistle between both sets of players and there may be some paperwork for the citing officer to complete for a few bits of 'argy 'bargy as they say!

Big surging rolling maul from Saracens has Quins pinned back in their own 22.

Quins penalised for coming in at the side and now they'll more defending to do from the attacking line-out.

To their relief though, Quins get the penalty from the next passage of play and a few of the home supporters can breath a sigh of relief.

Well, maybe Owen Farrell is human after all.

He tries to clear from just outside his own 22, but puts it out on the full. Big error there, but Quins fail to take advantage and Sarries intercept the line-out.

Mat Luamanu is then penalised for a no-arms tackle on Jackson Wray that will make a few eyes water when they watch it back on the replay.

It's now 1,001 points in his Premiership career for Owen Farrell to be precise.

His five in this game so far have given Quins a bit of a mountain to climb already.

And with that kick, Saracens and England fly-half Owen Farrell passes the milestone of 1,000 points in his Premiership career.

He's still got some way to go to catch the all-time record holder, his former team-mate Charlie Hodgson, on 2,623 points.

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Lang was a late injury-enforced change at fly-half for Quins remember for Marcus Smith.

It's a big test this one early on for the 22-year-old and already the visitors appear to have targeted him.

He's getting trreatment for a knock on his left shoulder while Owen Farrell has a penalty attempt from 25 metres out.

Stiff defence by Sarries on their own 22 and Quins can't find a way through.

James Lang tries an early drop goal attempt, but it's charged down by Jamie George and Quins are forced back into their own half.