Olympic 800m champion David Rudisha is facing a three-week layoff due to a knee injury he pick up two weeks ago while running in Central Park in New York City.
"Rudisha was jogging inside Central Park when he realised something was the matter with his knee," Said Colm O'Connell, Rudisha´s coach, on Tuesday.
"Two initial investigations were done, first in the USA and also in Germany, and we decided that he takes a three-week rest."
Rudisha will miss out Kenya's national championships, which start in Nairobi on Thursday June 20, but he is expected to run at the Moscow World Championships with no doubts.
"We are not sure yet whether he will be ready by the time of the Kenyan trials," O'Connell said.
"But being a world champion, we are expecting that he will get an automatic selection (known as a wildcard) to the championships.
"He does not need to run at the trials to be selected for the world championships. He will only run if he feels comfortable.
"We were already panicking, but we were assured by medical specialists after the second scan that he does not need an operation. But he needs between two to three weeks to rest."