Brent Pilnick
BBC Sport at Twickenham

What a first half.

When Exeter have previously played Saracens here they have been blown away in the opening 40 minutes.

When Henry Slade was sin-binned early on and Sarries went over twice you felt it was going to happen for a third time.

But Exeter have shown superb strength of character to take the game to the European champions.

I cannot wait for the second half!

Matt Dawson
Former England scrum-half on BBC Radio 5 live

As these teams came off, the Exeter team sprinted off. Half of the Saracens team walked off the field looking extremely tired.

Managed to catch your breath yet?

It's worth remembering the biggest come-back to win a Premiership final is just six points.

Northampton came from 6-0 down to beat Saracens in 2014, after 32 minutes.

Saracens were 7-0 down inside a minute today, and Exeter trailed 13-7 after 15 minutes.

Sonja McLaughlan
BBC Sport rugby union reporter

If the second 40 is as good as that 40 then don't go anywhere.

Image source, Rex Features

With the successful kick comes the half-time whistle.

Exeter have the lead after an eventful first 40 minutes.

Exeter fly-half Joe Simmonds makes no mistake from right in front of the posts, and extends the Chiefs' lead to six points.

Exeter get a penalty from the scrum.

It's central, and for once they'll go for the sticks.

The Chiefs are about five metres out and still plugging away. Jack Nowell finds some space and is stopped short.

Then the Devonians do go over... but the ball is held up by a red-shirted defender.

Five-metre scrum to come, with fewer than 15 seconds remaining until the break.

Image source, Getty Images

Exeter keep going through the phases - more than 15 now - but the Saracens defence is standing firm as things stand.

The Chiefs are gaining ground though, and are well inside the Saracens 22.

Exeter full-back Jack Nowell does well to claim a high ball under pressure on half-way.

That means Chiefs have another chance to mount an attack before the first half is out.

Matt Dawson
Former England scrum-half on BBC Radio 5 live

That kick should get Farrell back on track. He smashed it through the middle.

It's a lesson for Exeter. They can't give cheap penalties away.

Brent Pilnick
BBC Sport at Twickenham

Observers often say Exeter are just a side that grinds you down from close range.

But this afternoon they are showing how excellent their backs are - yes their tries have all come from a metre or so out, but the play in getting there has been excellent.

That one is straight and true from Saracens fly-half Owen Farrell.

Exeter flanker Don Armand has completed his HIA and is back on for Sam Skinner.

Saracens win a penalty inside the Chiefs half as Ben Moon gets up and carries on after being tackled - although he wasn't held.

A chance for Owen Farrell to reduce the arrears before half-time.

Small Man Peaky: Is Farrell’s poor kicking going to be the difference in this game?

Rhys Parker: Heart says Exeter - head says Sarries. Watching in Hong Kong...half a world away from Devon.

Referee Wayne Barnes calls for a scrum on the edge of the Saracens 22 after a knock-on from an Exeter hand.

Saracens win a free-kick and welcome back Maro Itoje from the sin-bin.

Time for some 15-a-side rugby.

Dave Dennis steps in and steals the ball at the breakdown and wins some useful metres for Exeter, who then get a line-out just outside the Saracens 22.

Saracens enjoy a spell of possession just inside the Exeter half, before Alex Goode sends a low kick out to touch on the 22.

In the meantime Sam Skinner comes on for Exeter flanker Don Armand, who is off for a head injury assessment.

So, Exeter back in front and have about another five minutes with a man advantage.

The game has been so high-tempo so far, there has been little time for tactics. Great viewing for the fans though.

Image source, Rex Features