David Rudisha, the Olympic and world champion and world-record holder in the 800m, will miss the world championships next week with a quad muscle strain, according to his social media.
Rudisha, 28, would have been going for his fifth global title at worlds in London, where he famously lowered his world record in arguably the greatest Olympic race of all time in 2012.
Instead, he will miss worlds due to injury for the second time in three editions.
The Kenyan bowed out ahead of the 2013 Worlds after finding a right knee injury after running in New York’s Central Park that spring.