New Zealand's champion shot-putter Valerie Adams says she remains fully focused on next year's Rio Olympics as she continues her return to the sport after surgery.
The world and Olympic champion is set to continue what she has described as her long and rocky road back from last year's operations - in the stadium where she won her second Olympic gold medal in 2012.
Adams said she was looking for competition fitness in tomorrow morning's Diamond League meeting in London.
Her 56-meeting winning streak ended when she returned to the circuit in Paris earlier this month.
She said she wanted to make sure she was in the best shape for next year.
The 30-year-old said next month's World Championships was important but she had won that four times, so Rio was the bigger goal.
"I'm making ends meet for now, but Rio is the main target."
She said it was good to be back in London and she loved competing there.
Also on the cards for the London meeting is the Jamaican sprint star Usain Bolt, who believes his performance will be a crucial indicator of his readiness to defend his World Championships sprint titles in Beijing next month.
Bolt will return to the scene of his triple Olympic sprint triumph at the London 2012 Games when he races over 100 metres, his first race since winning the New York 200 metres in early June, and his first 100 since running 10.12 seconds in Rio de Janeiro on 19 April.
Bolt insisted he would be ready for the challenge of toppling in-form American Justin Gatlin at the World Championships in Beijing next month.