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
Jonathan Jurejko
BBC Sport in Malaga
Well that was decent from Emma Raducanu, wasn't it?
The British number two told us yesterday she did not feel "too far behind" in match sharpness despite not playing for almost two months.
So far, she's been right. Her serve has been particularly sharp and the difference maker.
Seven aces, including four as she held for 5-3, and winning 80% of her points on first serve have done the damage.
*Niemeier 4-6 0-0 Raducanu
Lucie Ahl
Former British number one
Impressive set of tennis.
We weren't sure what to expect from either player since they haven't competed much.
Emma Raducanu has done a better job in terms of dealing with the situation and the pressure.
She's served brilliantly, that was key.
Image source, Getty ImagesShould Great Britain capitalise on Emma Raducanu's superb start and beat Germany, they will face defending champions Canada in the quarter-finals.
Canada sealed a 2-0 win over Italy in last year's final in Seville, with Leylah Fernandez and Marina Stakusic, who was ranked 258th at the time, claiming singles victories.
The win earned Canada a record $2.4m (£2.1m) in prize money, one year after the nation won its first Davis Cup.
*Niemeier 4-6 0-0 Raducanu
And there it is! Another strong serve that Jule Niemeier can't return.
It's advantage Emma Raducanu and Great Britain.
Image source, Getty ImagesNiemeier 4-5 Raducanu*
Emma Raducanu squats low to get power behind Jule Niemeier's return and squeeze it into the right corner of the court.
Two big serves follow and it's three set points for the Briton.
Niemeier 4-5 Raducanu*
Two returns into the net from Emma Raducanu gifts Jule Niemeier the hold.
Can Raducanu serve out the opener now? She's hit seven aces to Niemeier's zero.
*Niemeier 3-5 Raducanu
Jule Niemeier sends Emma Raducanu one way, then the other and eventually the 22-year-old Briton can't keep up.
However, we go to deuce as the German fires wide on the next point.
Jonathan Jurejko
BBC Sport in Malaga
Sir! Take a bow!
The fella draped in a Union Jack scarf does exactly that after an impressively-smooth catch from a framed return by Niemeier.
He's spent some time on the boundary of a cricket field over the years, clearly.
Image source, Getty Images*Niemeier 3-5 Raducanu
Jule Niemeier makes up for a missed overhead with two booming serves that Emma Raducanu can't return.
But the Briton claws her way back with a brilliant passing winner. 30-30.
*Niemeier 3-5 Raducanu
Lucie Ahl
Former British number one
Emma Raducanu did a brilliant job there.
It was all about the serve under pressure which is never easy.
Good mental strength there from the Brit.
*Niemeier 3-5 Raducanu
Finally! After nine minutes, Emma Raducanu backs up the break - saving five break points en route.
The British number two is one game away from the opening set.
Image source, Getty ImagesNiemeier 3-4 Raducanu*
Back to deuce we go as Jule Niemeier sends a forehand miles wide.
Niemeier 3-4 Raducanu*
It's high risk, high reward with these Emma Raducanu serves and that one proved just a little too risky.
Another chance for Jule Niemeier to level.
Niemeier 3-4 Raducanu*
The aces are absolutely flying off Emma Raducanu's racquet. That's four break points saved now.
Niemeier 3-4 Raducanu*
Emma Raducanu is going to have to save another break point if she is to hold serve here.
Niemeier 3-4 Raducanu*
Emma Raducanu saves the first and then lands an ace to save the second. Can she save all three break points?
Yes she can! Another big ace brings us to deuce and has the rest of the British team on their feet applauding.
Image source, Getty ImagesNiemeier 3-4 Raducanu*
Now it's Emma Raducanu who finds herself in trouble after lofting two forehands wide to open up a 0-30 lead for Jule Niemeier.
She's got the whole court to aim for in the next point, but she puts too much power on it and the ball fizzes long. Three break back chances for Niemeir.
Jonathan Jurejko
BBC Sport in Malaga
We all know the Brits love the Costa del Sol. And why (if we're sticking to stereotypes).
A healthy number of the sun seekers, the pint drinkers, the culture vultures, whatever, are here at the Palacios de Deportes.
Tennis tourists or expats, the Union Jacks give the game away. Especially the bucket hats. It's like Spike Island.
Several hundred Brits have got tickets and, so far, are beating the Germans in the supportive chorus singing.
Niemeier 3-4 Raducanu*
Lucie Ahl
Former British number one
Great return. There is just a sense that Emma Raducanu is starting to find her timing on the return and backing herself.
The numbers have been brilliant on serve for both players.
Image source, Getty ImagesNiemeier 3-4 Raducanu*
Jule Niemeier saves the first break point by sending Emma Raducanu from side to side before unleashing a massive overhead winner.
But the German can't deal with Raducanu's hefty service return on the next point and it's advantage GB.
