Jessica Ennis-Hill has delayed her comeback from an ankle injury yet again by opting not to compete at the Sainsbury's British Championships in Birmingham this weekend.
The 27-year-old has not taken to the track since winning the Olympic heptathlon title last summer and UK Athletics said her recovery has continued to progress slowly.
Her coach Toni Minichiello is still optimistic Ennis-Hill will be fit to compete at the World Championships in Moscow, but, with that event only a month away, there is now a real possibility that she will head to Russia having not competed all summer.
Ennis-Hill is following a comprehensive rehabilitation programme, working with the UK Athletics medical team and her physiotherapist Alison Rose.
Her decision not to compete in Birmingham means she has now pulled out of four meetings this summer, including her scheduled heptathlon in Estonia at the end of last month.
She initially opted to miss the indoor season following her Olympic exploits and start the outdoor campaign later than usual following her wedding.
The heptathlete is looking to regain her world title after having to settle for silver, behind Russia's Tatyana Chernova, in Daegu in 2011.
She is next scheduled to compete at the Diamond League meeting in Monaco a week today, followed by Loughborough and the Sainsbury's Anniversary Games the following week, although those participations remain very much up in the air.
Olympic long jump champion Greg Rutherford has also pulled out of the British Championships due to the hamstring injury he suffered competing in Paris last weekend.
"I'm hoping to be back on the track soon," he said.
With the event not on Mo Farah's schedule as he prepares for the 5,000 and 10,000 metres in Moscow, it means none of Great Britain's three Olympic champions will be competing at the flagship event in the British athletics calendar.
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