It's crunch time now.

Any mistake is likely to be the difference between winning this title and losing it.

But no drama here for Granollers.

Skupski brings up 10 aces in the match for the Brits to get to 40-15 before going on to get the hold.

Zeballos continues his fine streak on serve with another hold to love.

We stay on serve as the pressure keeps building.

Salisbury's run of 15 successive points on serve comes to an end when Zeballos places a forehand down the middle. 0-15.

But Salisbury's quickly back into his rhythm and takes the next four points to hold.

Zeballos smashes an overhead volley between the Brits for 40-0.

Skupski's return into the net means we stay on serve.

Skupski comes up good under pressure. An ace takes it to deuce.

One break point faced in this match and one saved.

Salisbury follows with a simple volley at the net for advantage and they go on to seal the hold.

A double fault from Skupski brings about a nervy moment with the Brits trailing 15-30 but they recover for 30-30.

Ah.

Break point.

Granollers and Zeballos came from a set down to beat Salisbury and Skupski in the French Open final.

Is history going to repeat itself here?

Well, they draw level in the deciding set.

Salisbury means business. He holds to love and that's now 15 successive points he has won on serve in regulation play.

Frustratingly, he was broken twice during that tie-break.

It's never straightforward.

Right, here we go then.

One set to decide which pair is crowned champions.

Salisbury on serve.

The Brits have lost four points in a row - Skupski needs to halt that momentum to stay in the set.

He wins the first point but is broken on the second.

We're going to a third and final set to decide the winner of the US Open men's doubles.

Zeballos has been the most consistent of the quartet on serve today and it's more of the same as he gets a couple of holds to bring up a smattering of set points.

Oh no.

A double fault from Salisbury wipes out the mini-break.

A big shot from Zeballos isn't coming back either.

This has turned around very quickly.

Granollers has been the weaker of the pair on serve. Can the Brits take advantage?

A hold to begin but Salisbury puts him under pressure and there is the first mini-break.

Salisbury up to serve next.

Zeballos gets the hold to start positively.

And Skupski follows suit, aided by a Salisbury volley to keep the tie-break on serve.

Salisbury sends the serve wide and Skupski is waiting at the net to volley the return - great teamwork to get to 30-0.

Salisbury gets the hold to love and we're going to a tie-break.

The Brits will be US Open doubles champions if they come through this.

Granollers isn't letting that previous service game play on his mind.

He gets the hold to 15 when Salisbury returns into the net.

Granollers and Zeballos are guaranteed at least a tie-break now.

It's feeling a little tense now.

Any mistake here on either side of the net could be very costly.

It was on the Granollers serve last time that Salisbury and Skupski earned and passed up three break points.

How will they fare this time?

Skupski, of course, served out to seal the opening set but he has been a little inconsistent with the ball in hand during the second.

Salisbury uses his long-lever arms at the net to defend a passing shot for 15-15.

Skupski raises his level when it matters with a couple of big serves sealing the hold.

What pressure?

Zeballos follows in Salisbury's footsteps with his own hold to love - that's his fourth unanswered hold in succession.

Skupski will serve to stay in the set.