The risk that a fairytale ending at the 2017 World Athletics Championships may not have panned out will have been a factor in Jessica Ennis-Hill's retirement, according to Darren Campbell.
Ennis-Hill on Thursday brought the curtain down on a stellar career in which she won Olympic heptathlon gold on home soil in London four years ago as well as two world titles in the multi-discipline event.
The decision to step away now means the 30-year-old Briton will miss out on an opportunity to write a final chapter in her career when the World Championships head to London's Olympic Stadium next year.
But Campbell understands the Rio 2016 silver medallist's decision, insisting she would not wish to jeopardise the memories of 2012 by failing to live up to expectations.
"I think when you've had such a successful career as Jessica Ennis-Hill, you kind of decide how you would like to retire," Campbell - an Olympic gold medallist in 2004 - told Omnisport.
"Also, you have to do the training that takes you to another championships.
"For somebody like Jessica Ennis-Hill, who has been so successful, the last thing she would want is to go to the World Championships in London, where she had magnificent success in 2012, and it not be the same.
"Yes, in an ideal world, you hope to go out at the top, one more big championships on home soil. But the reality of sport means that these fairytales don't always play out the way you would like.
"You just get to the point where you ask yourself 'What is left to achieve?'"