Backhand meets backhand before Pliskova's pace overcomes Brady, and she loops a return over the baseline.

Again, it's 0-40 as Brady nets, and again, Pliskova takes a step in and rushes Brady, forcing a double fault. Got somewhere to be, Karolina?

Image source, EPA

Jill Craybas
Former world number 39 on BBC Radio 5 live sports extra

A lot of Pliskova's opponents have gone deep down the centre of the court in a bid to try and open it up. That's something Brady could do to mix it up.

Oh! That's a shot and a half from Pliskova, a short volley up that Brady watches go trickling over the net.

The Czech races to 40-0 and pulls off another efficient hold with a serve out wide. Blink and you'll miss it.

Second set, same scoreline. Pliskova canters merrily to two break points as Brady, trying to go down the line, loops her forehand wide.

Brady fluffs her first serve and Pliskova capitalises, scorching a backhand winner to get the early break.

* denotes next server

Pliskova serves to start the second set and crashes down two big serves to press home her advantage.

Brady tries to return another cracker of a serve, but can only poke her return into the net. A hold to start the second set.

Image source, AFP

Courtney Nguyen
WTA reporter on BBC Radio

Pliskova has shown today what makes her so dangerous. She has been phenomenal.

It took Pliskova just 25 minutes to take that first set. It's been her most consistent performance of the tournament by far.

A look at the error count tells you that - Pliskova has six unforced errors to Brady's eight, and 12 winners to the American's four. Bosh.

Double set point for Pliskova as she advances to the net and batters a forehand winner.

Brady doesn't like her ball toss, gets called for a foot fault - and then fluffs her second serve! A double fault hands Pliskova the first set.

Image source, Reuters

Pliskova cuts a languid figure on court but there's so much power in her service games.

A double fault is the only slip from the Czech as she bashes an ace down the centre to hold. She's just a game away from taking the first set.

Here's game point for Jennifer Brady as a Pliskova backhand goes long - and the American cracks down an ace to get herself on the board!

Gigi Salmon
BBC Radio 5 live sports extra commentator at Flushing Meadows

Pliskova has just got too much. There are 90 places between the two in the rankings, so I guess you can expect that.

Image source, Reuters

Cheers and applause from the sparse Arthur Ashe court as Jennifer Brady makes her way out to serve.

She gets the first point but Pliskova opens up and cracks a fine forehand winner in response, before double break point comes up once again as Brady whips a return into the net.

The first is saved as Pliskova's backhand finds the net, and a good second serve, pushed into the corner, forces a deuce.

Image source, EPA

Piers Newbery
BBC Sport at Flushing Meadows

Ivan Lendl has done his bit for British tennis by helping Andy Murray to two Wimbledon titles, but today he is plotting the downfall of the UK's brightest prospects. Jack Draper, Aiden McHugh and George Loffhagen will take on three of America's best boys, among them Sebastian Korda, son of former Australian Open winner Petr Korda.

Lendl is overseeing the their development as part of his USTA role, and LTA counterpart Leon Smith says it will be "very tough" for his British trio today.

First up, McHugh v Oliver Crawford on Court Four.

Hello. There's Pliskova's first ace of the match, whizzing down at 107mph, and she races to a 40-0 lead in no time.

A forehand volley promptly tidies up a very speedy love hold.

Courtney Nguyen
WTA reporter on BBC Radio

My favourite player to talk to? I love Simona Halep. She's incredibly honest, sometimes too honest. But I like following her trajectory.

But Pliskova is right up there. She's very, very funny. She's very smart.

Image source, Rex Features

Brady is serving with the sun shining on her half of the court, and Pliskova makes the most of it to come forward and slap a forehand winner for 30-15.

A double break opportunity comes up in no time as Pliskova hammers a short serve down the line - oh, and the Czech whips out an exquisite return to Brady's first serve to take the game! We've only been on court for 12 minutes.

Image source, AFP

A flash of annoyance crosses Karolina Pliskova's face as she double faults to gift Brady another break point, but a backhand error restores parity.

An angled serve out wide is loosely returned by Brady, and Pliskova clinches the game as a swipe from Brady flies long.

Oop. Two fine backhand winners from Jennifer Brady, the second more intentional than the first, put her 0-30 up before Pliskova cracks two big serves beyond her to level up.

And now a double fault hands Brady a break back point, but Pliskova's having none of it, and draws a loopy backhand out of Brady for deuce.

* denotes next server

Image source, EPA

Brady, hitting out of the shade, gets on the board when Pliskova nets a forehand, but the Czech darts forward and cracks a winner beyond her.

A double fault puts Pliskova 30-15 up and then a horrible volley, right up at the net, hands Pliskova two break points.

The first is saved as Brady goes down the line - but then she lashes a deep return long to hand Pliskova the first game!

Both players have warmed up, we're ready to start - and, er, Jennifer Brady has nipped off court. It seems like she's had a quick outfit change. It's warm in New York today.

It'll be the American to serve first.

Image source, Getty Images