'I stayed patient and I reached my target. It is a great time for me in Berlin,' said Kemboi.

Defending world champion and 2008 Olympic champion Brimin Kiprop Kipruto of Kenya had to settle for seventh place while Moroccan Jamal Chatbi was kicked out before the final, testing positive for the steroid clenbuterol at an out-of-competition test on Saturday.

Nerius got a gold at last after bronze at the last three worlds and an Olympic silver in 2004, shocking the opposition with an opening round throw of 67.30m which proved good for gold.

Czech world and Olympic champion Barbora Spotakova had to settle for second with 66.42m and Maria Abakumova of Russia was third with 66.06m.

'The is the greatest and most beautiful moment of my life, winning the world championship gold at home in my farewell season,' said the 37-year-old Nerius.

Idowu beat world and Olympic champion Nelson Evora of Portufal with a huge third-attempt leap of 17.73m in which he did not even hit the board -- thus wasting some 20cm in what was still a personal best.

Evora came second with 17.55m and Alexis Copello of Cuba got bronze with a final attempt of 17.36.

In the hurdles, Clement surged to his second world title on the home stretch in a world leading 47.91 seconds. Javier Culson of Puerto Rico came second with 48.09m and Bershawn Jackson added bronze for the US in 48.23.

Bolt, 22, shut down after little more than half of his second round race as he won his second round in 20.41 seconds. Fellow-Jamaican Steve Mullings (20.23) and 2004 Olympic champion Shawn Crawford of the US (20.37) were among those with faster times

into Wednesday's semi-finals.

But Bolt had to conserve some energy in what was his sixth race in four days. Bolt won the 100m Sunday in a stunning world record 9.58 seconds and said he was ready to attack his world record 19.30 seconds from the 2008 Olympics in Thursday's final.

'I feel a little tired,' he said. 'I am taking it round by round, but in the final I will be running hard.'