"At the time it happened, it seemed like any other little injury that are commonplace in our sport," Whibley said.
"I rested it briefly and then got back into training but the pain and discomfort lingered and got worse as the season started to heat up. And it has progressively deteriorated ever since."
Whibley said it was now painful to grip the bike with his knees and he lacked the core strength to hold his position on the bike.
"It's more of a problem in muddy races and that's where my results have suffered most."
After visits to doctors and specialists, Whibley was given the news he was suffering a sports hernia and he went through a course of physical therapy which involved strengthening and flexibility work.
Unfortunately, however, that did not rectify the problem and he was told the next step was surgery, something which would come with a lengthy recovery time because it was a complicated operation.
The news was not only a blow to him but also to the many fans and supporters who had been pinning their hopes on him repeating the success of last season.
"With me knowing I can't deliver the results they want, it makes hard to stay positive. The hope is from here I can regroup and return to 100 per cent fitness for the 2014 season."