Roy Hodgson fears the introduction of Video Assistant Referee technology in English football could spark chaos.
VAR will be used for the first time in a competitive club match in England when on Monday Brighton host Crystal Palace in the third round of the FA Cup.
The former England manager, who has overseen Palace's remarkable improvement from near-certainties for relegation to contenders for a mid-table finish, was present at the 2017 Confederations Cup in Russia when VAR was used.
He was unimpressed by its influence, and while he believes if implemented correctly it can prove a positive addition in officiating matches, is concerned about the impact it will first have.