Frank Lampard has revealed he will never fully recover from the injury that destroyed the first half of his season.
England midfielder Lampard spent almost four months sidelined by a hernia and groin problem that was initially expected to rule him out only for a few weeks.
The injury was so severe, the 32-year-old admits he will have to nurse it for the rest of his career.
With club captain John Terry managing a thigh problem and full-back Ashley Cole having a chronic ankle complaint, it is another issue for Chelsea's medical staff to monitor.
Lampard said: "I've got to try to keep it strong because I've got a weakness there.
"My tendon came off the bone and it doesn't go back, you just have to stay very strong in that area.I've spoken to players who've had it and they know the frustrations and the aftermath and what you have to do."