London - Great Britain's heptathlon Olympic champion Jessica Ennis-Hill on Monday pulled out of this Thursday's Diamond League meet the Bislett Games in Oslo because she has not fully recovered from an Achilles injury.
The 27-year-old - who was not able to compete in last Saturday's meeting in Edinburgh, Scotland - said she was frustrated at having to sit on the sidelines with the outdoor world championships in Moscow just two months away.
A statement released by her manager revealed Ennis-Hill's foot has been responding well to treatment but she has been advised to rest it.
"I am so frustrated as I want to get out there and start my season, but am being advised to look longer term and focus on a plan that enables me to be in the best shape for the World Championships in Moscow in August," she said in the statement.
"Things are getting better and the stiffness is improving - but not quite as quickly as I would have liked.
"My next planned event is the Combined Events Challenge in Estonia at the end of the month, but I know that my coach, Toni Minichiello, will be looking at the race calendar for the next few months and making a few new plans."