Fine response from the world number one.

Jannik Sinner quickly wins two points in a row as he leans heavily on his powerful serve.

40-30.

A forehand off the rim of the racquet floats wildly off court from Jannik Sinner.

15-30.

Image source, Getty Images

Taylor Fritz gains advantage and a lovely forehand down the line proves too testing for Jannik Sinner to return.

A hold for Fritz as he wins his third game in a row.

This is bubbling up nicely.

It's saved by Taylor Frtiz.

A 23-shot rally and eventually Jannik Sinner's forehand is just wide.

Jannik Sinner isn't going to dwell on that break of serve and has a chance to gain his second of the match when Taylor Fritz puts into the net.

30-40.

Annabel Croft
Former British number one on BBC Radio 5 Live and BBC Sounds

Image source, Getty Images

Taylor Fritz is hopping, skipping and jumping around the court.

He has been given a lifeline with that horrendous miss from Jannik Sinner.

I knew you were trouble, Aly.

Oh Jannik Sinner!

The Italian lacks composure and volleys into the net.

Taylor Fritz breaks back.

Taylor Fritz's backhand is looking good.

He rifles it cross-court for the advantage.

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Jannik Sinner double faults and we go back to deuce.

It doesn't come more clinical than this.

A 130mph serve following by a crashing forehand winner.

Advantage Jannik Sinner.

Taylor Fritz is put under some serious pressure at the baseline and can only return into the net.

Jannik Sinner defends the first in emphatic fashion with a net volley which ends up bouncing high up into the stand behind Taylor Fritz.

That previous game has done Taylor Fritz the world of good.

A cross-court backhand winner is just out of Jannik Sinner's long reach and he follow it up with another winner.

15-40.

That's right Swifties, Taylor Swift is in the house tonight.

She's already been on camera twice.

How many times do we think the director is going to cut to the singer over the course of this final?

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

Image source, Getty Images

With an American man in the US Open for the first time in 15 years, it's no wonder the stars have come to watch.

If Taylor Fritz triumphs against Jannik Sinner, he will be the first American man to win a major singles title since Andy Roddick triumphed at the US Open in 2003.

Singer Taylor Swift, Kansas City Chiefs tight end Travis Kelce, actors Matthew McConaughey and Eddie Redmayne, singer John Bon Jovi and Anna Wintour, editor-in-chief of Vogue are just some of the big names in attendance today.

Image source, Getty Images

Much better from the American.

Fritz gets a hold to love of his own.

That'll settle those nerves.

The crowd sense that Taylor Fritz, making his Grand Slam final debut, needs a bit of support and get right behind their man.

It seems to work too.

30-0.

RosaPetrovna: I hope Fritz makes a good fist of the final. But even with the crowd's backing, it's hard to see him winning. Jannik Sinner's movement is so good, and he has few weak spots to target. If he has nerves he rarely shows them. Very hard to break down, but who knows...