Marie Bouzkova stands firm at the net and steers in a volley to give herself five set points.

No sign of Marie Bouzkova fading here.

The Czech isn't missing right now and makes it five points in six in the tie-break.

Marie Bouzkova once again just gets an extra ball back in play, and gets her reward as Sonay Kartal nets another forehand.

It's a long way back from here, but the Briton gets on the board with a winner.

Now, can Kartal find a way through on Bouzkova's serve?

Marie Bouzkova is so difficult to break down in these baseline exchanges, outlasting Sonay Kartal to take the opening point of the tie-break on the Briton's serve.

The Czech then sweeps in to slice a drop shot over, and another miss from Kartal puts Bouzkova in control at 3-0.

Sonay Kartal can't force the breakthrough.

We're going to a tie-break!

Sonay Kartal can only stand at watch from the net as Marie Bouzkova lifts a lob to the back of the court.

It's long, and Kartal reaches deuce...

This first set is about to tick over into a second hour. But just how much longer will it go on for?

How Sonay Kartal would love to clinch it here. The Briton is disappointed with herself after netting at 0-15, but she's just two points away now at 30-30.

A loose return from Marie Bouzkova, and it's an important one for Sonay Kartal as it bring her level at 30-30.

The Briton follows up another big serve down the centre to reach game point, and eventually ends Bouzkova's stern resistance to guarantee herself at least a tie-break.

Olga Savchuk
Ukrainian former player on BBC TV

What a touch. The footwork is just ideal from Bouzkova.

To pull it out at such a pressure moment is very gutsy from her.

A couple of excellent volleys at the net by Marie Bouzkova keeps the first set on serve.

Image source, Getty Images

Marie Bouzkova handles a couple of high-pressure points efficiently to recover to 30-30.

This is a big point now... It goes Bouzkova's way - but the Czech nets for deuce.

Olga Savchuk
Ukrainian former player on BBC TV

It's quite deliberate from Anne Keothavong. You want to relax your players at such a pressure moment.

You can spot that Sonay Kartal has settled into this match now, she knows where her game is at and where she is at. She has to be relaxed and have that clear thinking on the court right now.

Sonay Kartal makes her move!

A brilliant forehand down the line sets her up for a final winner and 0-30 on Marie Bouzkova's serve.

The first set is very much in sight now...

No panic whatsoever from Sonay Kartal.

That 0-30 score becomes game point after the Briton follows up a first serve with a forehand winner, and a fourth straight point puts her in reach of the set. Impressive.

Pressure here for Sonay Kartal, as Marie Bouzkova's run of points continues to 0-15, and then 0-30.

The Briton clinches a crucial third point with a superb wide serve, and reaches 30-30 as Bouzkova hits marginally wide.

Image source, Getty Images

Mel South
Former British player on BBC TV

I think Marie Bouzkova has really upped her level of play. Sonay Kartal has been really stable. The scoreline is where it's at - 50-50.

I think if Bouzkova can keep that aggressive style of play then she might just edge it.

Marie Bouzkova has certainly shrugged off her slow start.

The Czech cruises to a love hold - her first straightforward service game of this tricky test.

Marie Bouzkova makes a positive start on Sonay Kartal's serve with a backhand down the line. More noise from the Czech fans.

Kartal makes a swift recovery, though, and serves her way to another game.

Marie Bouzkova resets and a quick one-two punch off a wide serve keeps Sonay Kartal at bay.

An excellent touch at the net from Marie Bouzkova helps her to 40-0, but Sonay Kartal whacks a return down the line to stay in the game.

Another huge return! Kartal isn't letting this one go without a fight either...