Great Britain beat Germany 2-0 to reach last eight at Billie Jean King Cup Finals
Katie Boulter seals victory with dominant 6-1 6-2 win over Laura Siegemund
Emma Raducanu gave GB lead by beating Jule Niemeier 6-4 6-4
GB will face defending champions Canada in quarter-finals on Sunday
Boulter 6-1 5-1 Siegemund*
Katie Boulter goes for a bullet down the line, but she's just missed it.
We go to deuce, though, as Laura Siegemund mistimes a run to the net and the ball lands awkwardly at her feet.
Image source, Getty ImagesBoulter 6-1 5-1 Siegemund*
Can Laura Siegemund hold serve to postpone what seems like an inevitable Katie Boulter victory?
30-30.
Boulter 6-1 5-1 Siegemund*
One. Game. Away.
*Boulter 6-1 4-1 Siegemund
Katie Boulter can't let her concentration slip now. The British number one double-faults as Laura Siegemund takes a 0-30 lead.
She responds by hitting a series of backhands cross-court, and Siegemund can't deal with the increasing pace. 30-30.
*Boulter 6-1 4-1 Siegemund
The unforced error count is racking up for Laura Siegemund and another one here gifts Katie Boulter the double break.
Great Britain are just two games away from a place in the quarter-finals.
Boulter 6-1 3-1 Siegemund*
A wry smile from Laura Siegemund who looks rather dejected as she pushes another ball into the net.
And here comes the frustration. She holds her head in her hands and mutters furiously to herself as she slams a strike wide to give Katie Boulter three more break points.
Boulter 6-1 3-1 Siegemund*
A clenched fist from Katie Boulter and a confident strut to the baseline as she backs up the break.
It's a long way back for Laura Siegemund now.
*Boulter 6-1 2-1 Siegemund
Nope, says Katie Boulter. A big serve from the Briton that Laura Siegemund can only fire wide.
Deuce.
*Boulter 6-1 2-1 Siegemund
Katie Boulter saves the first with an unreturnable serve before Laura Siegemund flings a forehand long.
One more chance for the German.
*Boulter 6-1 2-1 Siegemund
What's this then? All of sudden, Laura Siegemund has three break points of her own.
*Boulter 6-1 2-1 Siegemund
Katie Boulter does remarkably well to stay in the point. She manages to come to the net and squeeze an angled shot across court, which Laura Siegemund, despite having a huge area of the court to hit into, sends wide.
Image source, Getty ImagesBoulter 6-1 1-1 Siegemund*
Katie Boulter is patient in defence, waiting for Laura Siegemund to make the first mistake which she does eventually by finding the fence.
Break point.
Boulter 6-1 1-1 Siegemund
A lovely backhand winner down the line opens up a 0-30 lead for Katie Boulter on her opponent's serve, but she squanders it by pushing the next three points into the net.
Then it's Laura Siegemund's turn to make an unforced error, firing a forehand long. Deuce.
*Boulter 6-1 1-1 Siegemund
Laura Siegemund is definitely an improved player at the start of this second set, but she can't quite do enough to harm Katie Boulter's service game as the Briton holds to 30.
Image source, Getty ImagesBoulter 6-1 0-1 Siegemund*
Nicely done by Laura Siegemund, who dinks a drop shot across court to leave Katie Boulter scrambling.
The world number 24 claws her way back with a huge forehand winner and then an ace. 30-30.
Boulter 6-1 0-1 Siegemund*
Laura Siegemund clings on.
The German number one has already won as many points on serve as she did in the first set. We're only one game in!
Boulter 6-1 0-0 Siegemund*
A mishit from both players takes us to deuce.
Boulter 6-1 0-0 Siegemund*
That's better from Laura Siegemund as she blasts a forehand down the line with pinpoint precision.
Katie Boulter plants the next point into the net. 30-30.
Boulter 6-1 0-0 Siegemund*
The pace that Katie Boulter is putting behind these returns is incredible. No wonder Laura Siegemund is struggling.
A double fault from the German opens up a 0-30 lead for Boulter.
Boulter 6-1 0-0 Siegemund*
Laura Siegemund has only won 44% of her first serve points, while she's yet to win a single point on her second serve.
The German number one serves first to get the second set under way.