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Switzerland continue their quest for a first Davis Cup title with a full-strength team for their quarter-final match with Kazakhstan.
The nation's top-four players in the world rankings are all available for the three-day World Group clash in Geneva, with much resting on the shoulders of Roger Federer and Stanislas Wawrinka.
Federer has returned to form this season with 22 wins in 26 matches and also claimed his first title since the Gerry Weber Open in June when he won the ATP Dubai Tennis Championships in February.
The 32-year-old reached the quarter-finals at the Sony Open last week, while Wawrinka was knocked out in the round of 16 by Alexandr Dolgopolov.
World number three Wawrinka has targeted the Davis Cup as an important tournament for him in 2014 and hopes to follow up the success he had when winning the Australian Open earlier this year.
"There is one goal that I have had for many years," he said. "It's the Davis Cup.
"Now Roger is playing, so we know that we are a strong team to do something.
"We'll need to be careful, but we have a good chance to make a big result this year, and that's the most important (goal)."
Switzerland face a Kazakhstan team that does not contain any players from inside the world's top 50. Andrey Golubev and Mikhail Kukushkin, ranked 64th and 56th respectively, were both knocked out in the first round in Miami.
Defending Davis Cup champions Czech Republic go into their last-eight tie against Japan without Tomas Berdych, their highest-ranked player.
However, Japan are also missing their number one after Kei Nishikori was forced to withdraw from his country's squad on Tuesday with a left groin injury.
Nishikori hopes to be back in action before the end of April, but has been replaced by 21-year-old rookie Taro Daniel.
Ahead of the contest with the Czechs, Daniel said: "It's a big stage for my first Davis Cup experience but I don't feel any pressure as I've never played before so I don't know what to expect."
Berdych won all three points in his nation's first-round win over Netherlands, so the pressure will be on world number 40 Lukas Rosol to step up in Tokyo.
France are another country without their top player following Richard Gasquet's withdrawal from the meeting with Germany in Nancy due to a back injury, his absence adding to the pressure on Jo-Wilfried Tsonga.
Three-time winners Germany have been depleted with injuries themselves.
Tommy Haas, Philipp Kohlschreiber, Benjamin Becker and Florian Meyer are all unavailable for captain Carsten Arriens, meaning Jan-Lennard Struff and Tobias Kamke will lead the team.
Great Britain can reach the semi-finals of the World Group for the first time since 1981 by beating Italy.
The only tie without a seeded team takes place on clay in Naples, with Andy Murray the highest-ranked player on either side.
Murray's team-mates are all ranked outside the top 100, however, and it will be a challenge to beat the experienced Andreas Seppi and Fabio Fognini to earn a last-four spot.