Radcliffe breaks down in New York
Britain's world record holder Paula Radcliffe has vowed to continue running despite suffering more injury problems during Sunday's New York Marathon.
Radcliffe, 35, finished fourth in the race but was plagued by knee trouble throughout, having only just returned from six months out after toe surgery.
But Radcliffe allayed fears over her long-term fitness and future in the sport despite her injury history.
"I don't feel the injury will impact on the future," she told BBC Radio 5 live.
"I'm not even tired and that is the frustrating thing so I don't think it is the end of my career."
The women's elite race was won by two-time Olympic 10,000m champion Derartu Tulu of Ethiopia, who saw off Russia's Ludmila Petrova in the final kilometre.
Radcliffe attributed the problem to tendinitis in the back of her left knee, which put pay to her attempts to win a fourth New York title, and a third in a row.
"It will go with rest," she stated.
"I'm not concerned about the next marathon I am just disappointed because I wanted to win and I put the hard work in, but unfortunately I was unable to capitalise on that.
"We knew it was a risk but I wanted to come out and race but it wasn't to be. My body almost hung out but didn't."
As well as bunion surgery Radcliffe has had an injury-hit year with tonsillitis and a hamstring injury causing her to miss both the World Championships and world half-marathon championships.
But Radcliffe also dismissed suggestions she is coming to the end of her career and felt had it not have been for the tendinitis she would have won the race.
Radcliffe also revealed she had had a cortisone injection last week to help ease the problem.
"I'm just very disappointed," added Radcliffe.
"The really frustrating thing is I don't even feel tired now but my legs just couldn't go any quicker.
"I honestly don't think it (the end) is happening to me yet, I just need to take a little time out and let my body recover and get strong.
"I totally believed that if it (tendinitis) hadn't come that I had a chance, and I think I could have won the race.
"It wasn't won in a really fast time. I think had things carried on to go how they did the first 10 miles I would have been fine."