"It might only be a ten per cent chance and you can probably make that nearer five per cent," he said recently.
"But there is nothing to be gained by giving up."
David Beckham suffered a similar injury just last week, sparking a media frenzy with even the Prime Minister asked to put his hand on a picture of the foto to bring good luck.
It was said that England's chances of success will be blown out of the water if Becks is not fit to travel, but if Neville fails to make it then there could be even greater problems.
"The coincidence with David Beckham's injury is freakish and we make a real sight hobbling around the training ground together," he said.
"I am sure people will be wondering what advice he has given me. Put padding on your crutches is about as far as it goes so far — otherwise you get sore hands.
"David's injury was from a kick whereas mine was more of a stress fracture, because I first felt some pain for England against Paraguay.
"With 20 minutes to go at Chelsea on Saturday, I felt more soreness but a scan showed only bruising.
"I trained on Tuesday and it was only when I went to get up from a tackle on Ze Roberto on Wednesday night that I felt a sharp stab. I tried to run it off but soon realised it wasn't going to go away.
"I said a fortnight ago that David had suffered the worst possible luck with his fracture but, in the timing, mine is even worse.
"I am not trivialising his injury but mine is more complicated because the bone comes under greater strain when you twist and turn. David has a great chance of going to the World Cup while I have only a little hope.
"I do know for certain that we are both receiving the best possible treatment, including ultrasound and the electrocurrent machine that I have to take to bed.
"Everyone has been very supportive and, reading the papers on Friday, I probably saw more nice words in one day than I have seen in three years."