Olympic 800m champion David Rudisha says he is not far from his best form as he gets set to return to the scene of his gold medal triumph.
David Rudisha is relishing a return to London's Olympic Stadium in the Diamond League this weekend as he bids to find "the right tuning" ahead of next month's World Championships.
Rudisha won the Olympic 800 metre title in London three years ago, doing so in a world record time of one minute and 40.91 seconds.
The Kenyan has since been hampered by injury problems and has not been able to hit the same heights, but goes into Saturday's race at an event known as the Anniversary Games in good spirits.
"My preparation this year for the World Championships has been going very well," Rudisha said. "So far we are happy with our progress.
"We have been doing quite intensive and long sessions and my body has been responding well, although we still want to build and to do some good sessions that will sharpen up just before the [World] Championships.
"It has been a challenge. It has been tough on me since 2012 when I had my criticism coming up to 2013, when I had the knee problem, 2014 trying to build up, but I'm happy.
"This year I have been able to be doing my sessions. I'm almost fully back and there are just a few things to fix, just to find the right tuning. Otherwise, I feel like my form is almost back. I'm almost there but it's just a matter of fine tuning.
"I know the body is there. I'm strong and the types of sessions we've been doing, the body has been responding well. So it's just finding that right tuning.
"I can't really say how fast we can go but if the condition is perfect and we find the tuning, we are capable of finding under one [minute] 43 [seconds].
"I'm very excited. I'm happy because this is where I ran one of my greatest races and to be back here, to be back in London is special to me."