Jessica Ennis-Hill has withdrawn from the European Cup Combined Events Super League meeting in Estonia this weekend because of an ankle injury.
The 27-year-old, who won heptathlon gold at the Olympics in London last year, has yet to compete this season.
"I have been running and putting some force through the ankle," said Ennis-Hill.
"But [coach] Toni [Minichiello] and I feel that doing a heptathlon is not the best option to fully recover."
Ennis-Hill added that her focus is on ensuring her ankle is right for the World Championships in Moscow, which start on 10 August.
She added: "Day by day it is feeling much more free and comfortable.
"This season's focus has to still be the heptathlon in Moscow and there are many other options to compete before then."
Ennis-Hill missed the start of the season but had been set to compete in Tallinn on 29 and 30 June.
Minichiello said: "Jessica does not need to do a heptathlon before Moscow - but it would have been useful.
"However, given her ankle is making slow but steady progress and things are looking much better we don't feel it is worth rushing it to compete this weekend in all seven disciplines.
"My job is to get her to Moscow in one piece, and in good shape, and that is my priority."