Czechs face opening quarter-final without Stepanek
The Czech Republic will go into the opening day of their Davis Cup quarter-final clash with Argentina without Radek Stepanek.
The 30-year-old had initially been pencilled in to face Juan Martin del Potro, but an injury to his knee means Ivo Minar will now play in his place on Friday.
Team captain Jaroslav Navratil said: "Radek has been having knee problems the whole week.
"We decided that he would not play on Friday because there would be too much burden."
It appears that Stepanek may still team up with Lukas Dlouhy in Saturday's doubles contest, and may feature in Sunday's return singles against Juan Monaco and Leonardo Mayer.
Tomas Berdych will face Monaco in the other singles match on the Friiday
Meanwhile, Russia have announced the line-up for their match against Israel which does not include former world number one Marat Safin.
Important
Russia coach Shamil Tarpischev has instead chosen Safin for the doubles competition, which is a decision the former world No.1 respects
"It is important not to take chances but to play with the best combination," said Safin
The 29-year-old has also revealed that he is to retire at the end of this season.
Holders Spain have put Australian Open semi-finalist Fernando Verdasco and Tommy Robredo up for the opening day singles against Germany.
Verdasco opens against the untested Andreas Beck on the outdoor clay, while Robredo will play Philipp Kohlschreiber.
The Spaniard will be without injured Rafael Nadal and David Ferrer so Verdasco returns to partner Feliciano Lopez against Nicolas Kiefer and Mischa Zverev in Saturday's doubles.
In the other quarter-final, American James Blake has been pitted against Croatia's Ivo Karlovic, while Marin Cillic will face Mardy Fish in the opening round of matches.