And they win a scrum-penalty too.

Really good defence from the hosts as they jam up a maul and stop Danny Care recycling the ball.

They win the penalty and are greeted by a huge roar from the crowd.

Billy Vunipola returns from the sin-bin so it's just down to 14 now for Sarries.

Quins have the ball inside their opponents' 22.

A third yellow of the afternoon for Sarries, all for high tackles.

Once again Sarries are down to 13.

That was a poor tackle from Alex Lozowski who went in head-to-head.

The referee is checking this.

Replacement Alex Lozowski goes in a little too hard on Joe Marchant and is worse off for it.

We stop immediately for a concussion check.

Saracens' Mako Vunipola is replaced by Eroni Mawi.

Over, but held up!

Goal-line drop-out.

Amazing from Nick Isiekwe.

Natasha Hunt
World Cup-winning England scrum-half on BBC Radio 5 Live

Harlequins need to get some tempo into their game.

Brilliant counter.

Quins have the ball inside Sarries' red zone.

Ten to go. Will Saracens hold on? Like for yes, dislike for no.

This game.

Sarries are suddenly the ones on the attack as Jamie George breaks free. But Quins defend solidly and win a defensive penalty.

Elliot Daly returns from the sin-bin.

Harlequins' advantage is now just the one player.

Harlequins penalty. 15 to go, they need a score ASAP.

Quins are right under the posts now.

Huge intervention. Saracens win the line-out!

Aled Davies immediately kicks clear, so Quins will have another go.

Yes he did! Saracens are down to 13 as Quins kick their penalty into the corner.

A Quins penalty for not moving away.

We stop for another TMO check. Did Billy Vunipola commit a high tackle on André Esterhuizen?

12th phase of possession for Quins with their extra player.

They're at the 22.