American Andy Roddick confirmed on Friday that he would not represent the USA in the 2010 Davis Cup to avoid causing any further damage to his suspect knee.
Roddick was speaking after he beat Richard Gasquet 6-3, 7-6 (7/5) in the quarter-finals of the Brisbane International.
The world number seven injured his knee during the ATP event in Shanghai last October, forcing him to withdraw from the tournament.
He said while the knee was not causing him any problems now, he wanted to protect it as much as possible throughout the coming year.
"I want to switch surfaces as little as possible this year with my knee, because of the way last year finished," he said.
"I'm not going to be one of the guys who plays when it's convenient, when it's close to home and on a good surface for him.
"In Davis Cup my view has always been you decide at the beginning of the year whether to go to everything or not and at this point we just decided that it was smarter as far as long term health is concerned, to at least be consistent with surfaces as much as possible."