They often represented Spain in international tennis competitions like the Davis Cup and Fed Cup.
Britain must win to avoid falling into the bottom tier of the Davis Cup.
Murray missed the first day's play of the Davis Cup with Serbia and Montenegro due to illness.
Koubek beat Greg Rusedski in the decisive rubber to relegate Britain from the Davis Cup World Group.
BBC: Koubek claims he did not knowingly take banned substances
The Davis Cup final takes place at the Memorial Coliseum in Portland, Oregon, from 30 November to 2 December.
Haddad and Ram competed in the Davis Cup tennis championships in Malmo, Sweden.
Murray aggravated his injury by playing three matches in three days in the Davis Cup loss to Poland last month.
As well as becoming the Davis Cup captain, Smith was also promoted to the post of head of men's tennis.
Argentina are trying to win the Davis Cup for the first time, while Spain are going for a third title.
Meanwhile in the Davis Cup, Serbia reached the quarterfinals with a 4-1 win over Sweden despite missing World No.1 Novak Djokovic.
But Skupski hopes the form he and his partner have shown will continue into the Davis Cup tie and also future events.
"A three-month ban would mean that I not only will miss the Australian Open, but also the Davis Cup in Australia, " said Koubek.
BBC: Koubek claims he did not knowingly take banned substances
Henman was delighted with his return to the Davis Cup after three years away and confirmed he would still be avaialble for future ties.
Spain won the Davis Cup in 2000 and 2004, but lost three times as visitors in 1965, 1967 and 2003 - each time against Australia.
But the team captain, who played with Henri Leconte when France beat the United States to win the Davis Cup in 1991, was impressed with their fightback.
"For the record, I was 11 when I watched Guy and Henri beat the United States in the final of the Davis Cup in 1991, " he said.
"After a long and very positive season, it pains me to miss the two main objectives of the year, Shanghai and the Davis Cup final, " he said.
The humiliating 3-2 Euro-Africa Zone Group Two loss in Vilnius leaves Britain facing a July play-off against Turkey to avoid demotion to the Davis Cup's lowest tier.
Meanwhile, the man who last beat Nadal did not need to repeat his Saturday exertions as the Czech Republic reached the quarterfinals of the Davis Cup .
In addition to his grand slam triumph at Roland Garros, Ferrero was also part of the Spanish teams who won the Davis Cup in both 2000 and 2004.
Stepanek, Novak and doubles pair Cyril Suk and Martin Damm will team up for the Czechs against Russia in the Davis Cup first-round tie starting on 7 February.
It's pretty tough playing tennis in India, which is borne out by their great home record in the Davis Cup - not many teams get an away win there.
He bounced back to form in October, helping Britain beat South Africa in the Davis Cup, winning the Grand Slam Cup in Munich and the ATP CA Tournament in Vienna.
Djokovic also prevailed when they met in the first round of the Davis Cup three years ago, as his country went on to win the title for the first time.
That victory over world number one Lleyton Hewitt at last year's Paris Masters gave a glimpse of Safin's talent, as did his form in helping Russia win the Davis Cup.
By the luck of the Davis Cup draw, Serbia played two home matches at the end of last year and eventually won its first Davis Cup title, with Djokovic leading the way.
"When you take American tennis in general, it's probably right to say it's not our best surface, " said Courier, the Davis Cup captain, during the U.S. team's victory over France this month.
The world number three was carrying a wrist injury and admitted he was only playing because it was the Davis Cup, and was clearly in a hurry to get the job done.
Ferrero was also the key member of the Spanish team which won the Davis Cup for the first time in 2000, beating Pat Rafter and then Lleyton Hewitt to clinch the tie.
Meanwhile, Novak Djokovic gave Serbia the perfect start to the Davis Cup quarterfinal against the United States as the world's No. 1 men's player defeated John Isner in Friday's opening rubber in Idaho.
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