Alexander Zverev shanks a forehand long!

He's 0-40 behind and that means Taylor Fritz has three set points...

Is this the chance? Taylor Fritz does well to push a 130mph serve back deep.

0-30.

Taylor Fritz picks up any pressure he might have been feeling and throws it back onto his opponent's side of the net after a hold to love.

Zverev will now serve to stay in the set for a second time.

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

If it carries on like this, it feels like this is heading in to a tie-break.

Even when Alexander Zverev misses a first serve in this game he crunches a 114mph second effort. Us club players can only dream.

A couple of points later, Taylor Fritz is annoyed after missing what he thinks was a chance to pass his opponent at the net. A wild forehand follows from the American.

On we go.

Taylor Fritz may not be able to match those numbers but he's looking just as confident on serve. Another hold nudges him ahead again as we reach the business end of the set.

Alexander Zverev has only missed three of his 24 first serves so far. That's handy to say the least.

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

It's going to be about the patience mentally for both players.

It's about having to create opportunities on second serves, getting the return back into play and trying to make that breakthrough when the opportunity is presented.

They have already had some extraordinary exchanges so far in this match, no wonder the crowd are responding as they are.

Taylor Fritz dazzles again with a backhand that Alexander Zverev doesn't even bother chasing down. He's playing the better groundstrokes. Zverev is powering down serves.

It has been a high-quality start.

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

This is pretty physical. Both players are having to sprint back and forth on the angle and use all of their agility.

Their legs will be hurting with the amount of movement they have had to do in the last few points.

Lovely, lovely tennis!

Alexander Zverev stands with his arm in the air after winning a point that had both men scrambling at one stage. Fritz had a chance with a backhand volley but didn't quite do enough.

The crowd responds with cheers for the German. It hasn't been too partisan so far and we remain on serve.

Despite that miss, it's probably Taylor Fritz that has started the stronger. With a swish of the big forehand the game is sealed, leaving him free to stride back to his chair with purpose.

He looks up for it.

Image source, Getty Images

Danger averted by, you guessed it, the Zverev first serve.

There was a scruffy miss by the American on the break point, however. It's very early but the type of backhand into the net you can come to rue.

Alexander Zverev is stood so deep he could ask the ball kids what they had for breakfast. Taylor Fritz sees that and catches him out with a drop shot.

A gruelling point follows which Fritz wins, bringing up the first break point of the match.

We're going to talk about the serves a lot in this match. Both of these men stand more than 195cm tall and there serve comes from even higher than that when they reach up with a jump.

A couple of loose shots from the American take us to deuce but Fritz's powerful first dig gets him out of trouble.

Alexander Zverev keeps that American crowd quiet in his first service game by wrapping it up with minimal fuss.

There were three big first serves in there. That always helps.

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

Image source, Getty Images

It's an interesting one, this match. It is a hard one to call, there is nothing in it really.

Taylor Fritz has got a huge forehand and Alexander Zverev has a huge backhand.

It will be the little tiny margins and who executes to perfection on the dy. The crowd will be behind the American the way they were for Emma Navarro, I think they had a huge impact on the result in that match.

But Zverev is quite mentally tough in situations like that. I think he has walked into this match very mentally prepared to take on the crowd.

I think it is going to be fascinating, I can't call this one.

Alexander Zverev has dropped the opening set in three of his four matches so far in New York. Perhaps he's just the kind of guy who enjoys a lazy morning. Who can blame him?

Taylor Fritz strides confidently as the home crowd cheers, having seen their man notch the first game of the match.

The winner of this match will play Frances Tiafoe or Grigor Dimitrov. They are two fine players but it could be worse in a Grand Slam semi-final.

Does that add its own pressure? I'll let you answer.

The warm-ups are done. It'll be the lanky Californian to serve...

Image source, Getty Images

Alexander Zverev has his eyes on a maiden Grand Slam title after making it through to the US Open quarter-finals.

The fourth seed, who lost in the final at Flushing Meadows in 2020 and Roland Garros earlier this year, breezed through to the last eight with a 3-6 6-1 6-2 6-2 win over Brandon Nakashima.

And with Carlos Alcaraz and Novak Djokovic already out, Zverev might just think this is his time to finally land a major title.

“I’m happy to be back in the quarter-final,” the German said. “I just need to win one more set than the last two times in the final. I am doing everything I can.

“Everything else is out of my power, I am trying my best and hopefully it is going to be enough at some point in my career.”