Naomi Broady
British player on BBC TV

Marketa Vondrousova grew up playing in these conditions: a slow, chilly clay court.

She has won six of her seven BJK Cup singles matches and four of them have been on clay.

She's one of the better clay-court players on the WTA tour.

That's why Emma Raducanu comes into this match thinking she is the underdog.

Anne Keothavong has got the full winter kit on - hood up, gloves on, several layers underneath the coat.

Sonia Oxley
BBC Sport in Prague

It’s fair to say these are not the conditions you’d associate with playing on clay – gone is yesterday’s sunshine, it’s cold (2.4 degrees first thing this morning according to the thermometer outside the window – it’s probably hit 5C by now), it’s cloudy and it’s windy. Expect to see some woolly hats in the crowd!

Image source, BBC Sport

Raducanu and Vondrousova have met before - and we're sure you remember it.

The British teenager memorably beat the Czech in the Wimbledon second round last year.

"She’s a great player and she made the final of the French Open. She loves clay and I’m looking forward to playing her," says Raducanu about today's match-up.

"If you are going to have a challenge, why not pick the toughest one. I’m up for it and who knows what happens.

"I know I’m going to give my all and Harriet – or whoever plays, I’m sure it’s Harriet – will give her all so the team is really pumped and looking forward to it."

Here's a reminder of what happened when Raducanu and Vondrousova last met...

BBC iPlayer

You can watch today's action on BBC iPlayer and on the BBC Sport website and app.

Just click the link at the top of the page.

Harriet Dart kicked off the tie against Marketa Vondrousova but she struggled against the former French Open finalist.

Vondrousova, who won the silver medal at the Tokyo Olympics last year, triumphed 6-1 6-0.

It was then down to Emma Raducanu, in her first professional clay-court match, to keep Great Britain in the tie.

She had to work hard and think on her feet to eventually come past Tereza Martincova 7-5 7-5.

Image source, Getty Images

• Emma Raducanu v Marketa Vondrousova
• Harriet Dart v Tereza Martincova

If you're new to following the BJK Cup - or forgotten the drill since the last one - here is how things will work in Prague:

• The tie is the best-of-five matches
• Two singles matches on Friday
• Two more singles matches on Saturday and one doubles rubber - if needed
• Played on outdoor clay

The winners will qualify for November's finals, while the runners-up will face a play-off tie in the same week.

However, Britain are among the nations bidding to host the finals and could also still qualify as the host nation.

The tie is level at 1-1.

Can Great Britain seal their place in the Billie Jean King Cup Finals?