Frank Lampard fears failing to follow simple personal rituals such as walking his dog at a specific time can have a negative impact on Chelsea's results.
Blues boss Lampard has been superstitious since his playing days and sticks closely to routine.
His customs include spending a precise amount of time exercising and adhering to a schedule when taking out his pet dog, Minnie.
Chelsea will hand a late fitness test to Mason Mount ahead of the lunchtime meeting with Palace due to an ankle problem suffered in the midweek draw with Ajax, but Ross Barkley is ruled out with a similar issue and fellow midfielder Jorginho is suspended.
Lampard will come up against his former England manager Roy Hodgson when the Eagles make the short journey to west London.
At 72, the vastly-experienced Hodgson is the oldest manager in the top-flight and Lampard, who is the youngest, will be honoured to be in the opposing dugout.
"It's incredible, his career in management, and I had huge respect as a player when I played for England under him," said Lampard.
"I loved playing under him in terms of how he was, his man-management, his enthusiasm for the game and now seeing what he's done at Palace.
"(He's) an absolute gentleman. Very smart. I have nothing but praise for him and it will be a very nice honour to go up against him as a manager."
