Linda Fruhvirtova gets herself in front for the first time in this service game, but another fine move, slide and swirl of the racquet takes us back to deuce.

Dart overcooks her attempted bunt back to take us to deuce.

Harriet Dart has another chance, though, as a volley hurries her along to another break point.

Oh, that's a good bit of defending from Linda Fruhvirtova!

A lob rescues her for deuce.

That's one saved as Dart nets a backhand.

30-40.

Trouble again for Linda Fruhvirtova as a netted slice leaves her 0-30 down.

Fruhvirtova gets herself on the board but it's Dart who conjures herself two break points...

Sonia Oxley
BBC Sport in Prague

The sun has finally come out in Prague - it’s matching the British mood after this opening from Dart.

Out wide goes an unreturnable Dart serve, and Fruhvirtova eventually slaps a forehand into the net tape to wrap up a hold for the Brits.

Good, determined grit from Dart to see that game out.

A confident overhead puts Dart within touching distance of a hold, before Linda Fruhvirotva responds with a clean forehand winner of her own.

Linda Fruhvirtova is slipping and sliding around the baseline and eventually, overstretched on the right, swats her forehand into the foot of the net.

Deuce.

The pressure is straight back on Harriet Dart though as she finds herself 0-30 down before Linda Fruhvirtova spears a forehand long.

A superb forehand from Harriet Dart draws things level, but a big reply from Fruhvirtova hands the Czech a break point.

What a start from Harriet Dart!

Some brilliant hitting from the baseline and she finishes off the point with a move to the net and popping home the volley.

Lovely from Harriet Dart, standing tall and smashing a forehand winner onto the tramlines for a 15-30 lead.

She misses a push down the line but Linda Fruhvirtova slips into a double fault to hand the Brit an early break point.

Linda Fruhvirtova will serve first.

Here we go.

So, it'll be Linda Fruhvirtova to take on Harriet Dart in this must-win match for Great Britian.

Some of you still might not be fully sure what the Billie Jean King Cup is. Well, it's the Fed Cup - which, in 2020, was renamed in honour of one of the sport's greatest champions.

King, a 12-time singles champion and long-time campaigner for gender equality and other social causes, kicked off the weekend with a good luck message to everyone competing this weekend.

"Best of luck to the 14 teams taking part this weekend in the Billie Jean King Cup qualifiers this week. All around the globe the world cup of women's tennis is in full swing," she said.

"With a record 127 nations competing in the BJK Cup this year, women's tennis is stronger than ever. Tune in and follow along."

We were expecting Harriet Dart to play world number 50 Tereza Martincova in the second singles rubber.

Instead she will face 16-year-old Linda Fruhvirtova, who is being heralded as the next star of the Czech game...

Oooh, there has been an interesting move from the Czech camp...

Here's Emma Raducanu chatting yesterday about her toenails and the general pain a tennis player's feet go through.

"They are still black and I’ve just got mad blisters," she says.

"I’ve had this even on hard courts, because I’ve actually been sliding a lot recently on hard courts.

"I just feel like I really need to harden my skin. I’ll take any suggestions...”

Utterly dominant by Marketa Vondrousova.

Image source, BBC Sport