Andy Murray will not feature for Great Britain in their Davis Cup quarter-final tie against Germany on Friday after Kyle Edmund was once again picked for singles action.

Murray was rested for the Group E victory over Kazakhstan on Thursday that secured Great Britain's place in the knockout stages of the new-look tournament in Spain. 

Captain Leon Smith admitted after the 2-1 win that he was unsure if the Scot - who had laboured to a three-set victory over Tallon Griekspoor of the Netherlands in his team's opening outing - would return to the line-up.

And Edmund, who played instead against Kazakhstan, recording an impressive victory over Mikhail Kukushkin, has retained his spot in the line-up.

His opponent in the opening match will be Philipp Kohlschreiber, with Dan Evans then going up against Jan-Lennard Struff.

If required, Jamie Murray and Neal Skupski will once again team up for the doubles. Kevin Krawietz and Andreas Mies are scheduled to be their opponents.

The winners of the tie will go up against either Argentina or hosts Spain - who also meet in Friday's second session in Madrid - in the last four.

In the other half of the draw, Russia knocked out Novak Djokovic's Serbia courtesy of a hard-fought doubles win, Andrey Rublev and Karen Khachanov saving three match points before eventually prevailing. Next up will be Canada, who qualified for the semi-finals on Thursday.

Great Britain captain Leon Smith has not yet decided whether Andy Murray will be involved in the Davis Cup quarter-finals.

Murray – who overcame Dutchman Tallon Griekspoor 6-7 (7-9) 6-4 7-6 (7-5) on Wednesday – was rested for Great Britain's 2-1 Group E victory over Kazakhstan on Thursday.

The tie was level at 1-1 heading into a decisive doubles rubber, with Neal Skupski and Murray's older brother Jamie coming out on top 6-1 6-4.

And Smith says former world number one Murray may not feature on Friday against Group C winners Germany.

"Andy is a team player and understands what is best for the team," Smith told reporters in Madrid.

"There is no awkwardness about who is going to play, who isn't going to play. It is a good, open and honest discussion. That's what we will do again.

"It might be one of the more difficult decisions I've had to make, but it is also better when you have got the quality we've got to be able to have those discussions.

"We can look at who is in the best physical condition, and look at the match-ups again, linking those factors together to do what is best for the team.

"Because we are scheduled tomorrow evening, it gives us time to see if everybody is right and how they feel."

Novak Djokovic ensured Serbia's progression into the last eight of the Davis Cup Finals with a straight-sets win over France's Benoit Paire in Madrid.

Djokovic's team-mate Filip Krajinovic had teed up the chance for the world number two to send Serbia through from Group A with a 7-5 7-6 (7-5) triumph over Jo-Wilfried Tsonga.

After a group-stage exit at the ATP Finals in London last week, Djokovic made no mistake against Paire, winning 6-3 6-3 to secure a 2-1 victory for Serbia and send last year's runners-up France out in the process.

"The team is looking good, we won all six sets yesterday," Djokovic said at Caja Magica. "It was important getting a clean sheet against Japan coming into today’s match.

"Filip definitely gave me wings with his win, which was quite amazing. Tsonga was playing well and in good form and Filip was just fantastic on the court today. Credit to him."

Serbia, champions in 2010, will now face Russia in the quarter-finals on Friday and are joined in the last eight by Great Britain, who overcame Kazakhstan in a decisive doubles rubber.

Alexander Bublik's 5-7 6-4 6-1 win over Daniel Evans left the Group E contest tied at 1-1 heading into Thursday's decider.

However, Bublik, paired with Mikhail Kukushkin, failed to maintain his winning form, and Great Britain booked the remaining knockout place as Jamie Murray and Neal Skupski came out on top 6-1 6-4 in 72 minutes.

Group C winners Germany await Great Britain in the quarters, with Philipp Kohlschreiber's 6-4 6-3 defeat of Nicolas Jarry having sent them through at the expense of Chile.

Cristian Garin at least claimed a consolatory win – Chile's first of the tournament – with a superb performance against Jan-Lennard Struff, saving three match points en route to a 6-7 (3-7) 7-6 (9-7) 7-6 (10-8) success.

Glory for Kevin Krawietz and Andreas Mies in the doubles capped off a 2-1 triumph for Germany, with Garin's ultimately the only sets won by Chile at the Finals.

Kyle Edmund has been named as the fifth and final player in Great Britain's line up for the Davis Cup finals.

Having endured a poor run of form, losing eight matches on the bounce, former British number one Edmund rallied with successive victories at the Paris Masters earlier this week.

He eventually fell to world number one Novak Djokovic in the round of 16, but his displays against Ricardas Berankis and Diego Schwartzman were enough to cement his place in Leon Smith's squad for the new-look event later this month.

Andy Murray had already been named in Great Britain's team after his triumph at the European Open, alongside his brother Jamie, Neal Skupski and Dan Evans.

"I'm delighted to name Kyle as the final nominated player to our Davis Cup team," Great Britain captain Smith said of Edmund, who saw off competition from Cameron Norrie.

"While Kyle has had a tough few months, he showed at the Paris Masters what level of tennis he is capable of producing.

"It's been a difficult decision to make as Cam Norrie has had a very good year on tour and is finishing the year ranked around number 50 in the world.

"It's a strong position for our team to be in when we have such high-quality players vying for selection."

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