(BBC) Paula Radcliffe has admitted she may never be able to compete again after complications with a foot injury left her struggling to run.
The British world marathon record holder, 39, has not run beyond a short jog for eight months, since she was ruled out of the 2012 London Olympics.
She said her hopes of competing in a 10km race in the spring of 2013 had been shattered.
“Targets have gone out of the window,” she told BBC Sport.
Radcliffe hopes to end her career with at least one more competitive outing, but knows it is not guaranteed.
“I’m very much in that limbo where I know and accept that realistically it may not be possible,” she said.
“But at the same time I have a little window of hope and I would rather be able to finish my career in a race, rather than a race I can’t actually get to the start line of.”
Radcliffe is one of Great Britain’s most well-known female athletes.
Despite effectively running for 18 years with a broken bone in her left foot, she was world marathon champion in 2005 and twice won the world cross-country title.
Next month marks the 10th anniversary of her setting a stunning new world record, a mark which she still holds today, when she completed the 26.2 miles of the London Marathon in two hours, 15 minutes and 25 seconds.
The run on 13 April 2003, broke her own world best (in Chicago in 2002) by nearly two minutes and no-one has come close to bettering it.
But victory on the biggest athletics stage of all, the Olympic Games, eluded her.
She was fifth in the 5,000m at Atlanta in 1996 and fourth in the Sydney 10,000m four years later before disappointing in the marathon in 2004 and 2008.
The dream of competing in front of a home crowd at the London 2012 Games ended shortly before the Olympics was due to begin and she had foot surgery on 22 August last year.
“My target when I had my surgery was to run at the World Cross-Country Championship [which took place in Poland on Sunday 24 March], which I would have loved to have done,” she said.
In December she told the BBC of her aim to run a 10km race in the spring, but a serious setback left her wondering if she would ever run again.
“It was probably looking pretty bleak in December. I was really starting to severely worry if I was actually going to ever get back to running, even for pleasure,” added the mother-of-two.
“I’ve not even been able to run after the kids in the last few months, and you start to think about the first goal – to get back and be able to have a normal active life and then worry about if I can get back to competing.
“In all honesty with me, it was probably always going to be something going wrong with my body that would make my career start to wind down because I am always going to want to keep competing and keep getting out there.
