Greg Rusedski, Britain's No 2, has withdrawn from the Davis Cup match against Zimbabwe at Crystal Palace this weekend, because of continuing wrist trouble.
It means that Britain will go into the Euro/African Group One tie with a much weakened team as Tim Henman, the top-ranked Briton, has already dropped out following an operation on his elbow last week.
If Britain win they will advance to the World Group qualifying round from 19 to 21 September, the draw for which will be made later this year. Should Britain lose they stay in Euro/African Group One.
The revised British squad is Mark Petchey, Andrew Richardson, Jamie Delgado and the doubles specialist Neil Broad.
Zimbabwe's No 1, Byron Black, is ranked 46 in the world. Britain's highest ranked player is now Petchey at 196. This makes Britain's task in the tie formidable although Zimbabwe's No 2 player, Byron's brother Wayne, is only ranked 274.