15-15.

Like a person disappointed with their Antiques Roadshow valuation Murray looks down at ground after failing with a return.

30-15.

40-15.

The Spaniard then picks out the net.

Chance Murray?

Nope, the Spaniard holds.

Dom Inglot
British doubles player on BBC Radio 5 live sports extra

Great disguise from Verdasco. He has to use that drop shot a little bit more. Andy was miles behind the baseline because he knows Verdasco's forehand has so much heat on it, so the drop shot was open.

Jonathan Jurejko
BBC Sport at Flushing Meadows

More irritation from Andy Murray towards umpire Nico Helwerth, who calls a return from the Briton long.

"You've got to stop doing that... you're as far away as possible. I'm going to challenge that."

Turns out the umpire was right. That evens them up after the umpire's error in the first set.

The Spaniard then gets his sharp knife out for a lovely slice.

Two break points for 'Dasco.

Murray goes long.

He's a break down already.

This is topsy turvy.

15-15.

The chair umpire calls out but Murray argues the decision.

It was out.

15-30.

Dom Inglot
British doubles player on BBC Radio 5 live sports extra

Again, very confusing from Verdasco, because he broke back and then when he was serving he seemed to check out - is it fitness? No, he's one of the fittest guys out there. Maybe it's irritation.

It's easy to make those balls at 0-0, but on the big points he's going for big, full-blast forehands down the line - you can't get so upset with your choices... I'm a little bit lost for words.

Make that 15-40 after the Scot wins a net battle.

Two set points.

Verdasco produces his first double fault of the set to unintentionally hand Murray the set.

A spectator is asked to take his seat - he's on his phone and is oblivious to the fuss.

Er... nice one pal.

15-15.

Murray produces a beautiful backhand to move to 30-15 on the 'Dasco serve.

Two set points for Cameron Norrie...

Now he's cooking. Lajovic goes wide with the backhand, and the British number two takes the second set.

Just 31 minutes needed for the left-hander to turn things around and level up there.

30-15.

Superb angled forehand from Murray moves him to a point of holding.

He holds with a smash at the net.

Over on Louis Armstrong Stadium, third seed Juan Martin del Potro is firmly in control against American Denis Kudla. The Argentine has won 89% of points on his first serve so far and is still yet to face a break point.

Image source, AFP

Well played 'Dasco and he makes Murray dance a jig before smashing the ball past him.

The Scot appeared to then point to the spidercam above him. Or some divine entity.

15-15.

But the Spaniard goes wide with a forehand in the next.

He panicked.

Murray back on top.

Jonathan Jurejko
BBC Sport at Flushing Meadows

Murray seems to be blowing harder behind the baseline now as he waits for every Verdasco delivery.

Dusan Lajovic has a brief medical timeout, but the Serb doesn't seem to be hindered at all as he returns to hold serve to 15.

Norrie responds with a rapid hold of his own. That's 5-2, and Lajovic will have to serve to stay in the second set.

15-30.

15-40 as Verdasco makes an error.

Well, now.

One saved with a flat, low forehand from Verdasco.

Rally o'clock sees Murray comes out on top, which he has tended to do in this match.

Twenty shots of it!

15-0.

All that effort just to hit the ball into the net in the next point.

Dom Inglot
British doubles player on BBC Radio 5 live sports extra

They always say it's not a break until you hold in the next game.

He made two backhand errors in one game - he just seemed to give it away. He needs to be a little bit more solid.

Murray has only managed 10 winners so far in this match - but produced 26 unforced errors.