"I have recently come back from training and I'm not fit enough for the Olympics." Paul TergatHowever earlier this month the Ethiopian said he would compete in the 10,000 metres event at the Games.
Tergat said a lack of preparation prevented him from competing.
"I only recently completed a military training course and I have not trained well enough for the Olympics," he told reporters in Nairobi.
"I have participated in three Olympics before and that is quite an achievement," he added.