Russia's Olga Kaniskina battles the hot weather in Osaka to win the women's 20km walk in 1:30:09

Great Britain's Johanna Jackson comes home nine and a half minutes later to finish in 25th

USA's Breaux Greer wins his javelin heat but the longest throw of 87.37m comes from Vadims Vasilevskis in the second group

The decathlon opens with the 100m where reigning champion Bryan Clay posts the fastest time of 10.44 seconds

Belgium's Tia Hellebaut is among 16 athletes who meet the qualifying standard of 1.94m to progress in the high jump

Clay also goes on to dominate the decathlon's long jump competition with a season's best leap of 7.65m

His shot putting lets him down though, allowing Maurice Smith to take the overall lead after an impressive throw of 17.32m

An impressive performance by Roman Sebrle in the high jump sees him tuck in behind Smith in second after four events

Ukraine's Iryna Lishchynska is fastest in the 1500m semi-finals as Britons Abby Westley and Lisa Dobriskey go out

Alfred Kirwa Yego stars in the fastest 800m heat, coming home first to book his place in Sunday's final

British interest in the event ends, however, as Michael Rimmer's sixth place is not good enough to progress

Asafa Powell leads home Jamaica's team in the 4x100m relay heats to show their prowess in the event

They are joined in the final by Great Britain who get all their changeovers right to finish second to Brazil in the other heat

Women's triple jump gold goes the way of Cuba's Yargelis Savigne who edges Russia's Tatyana Lebedeva into second

American Allyson Felix leaves the competition in her wake to successfully defend her 200m title at the age of just 21

The Czech Republic's Barbora Spotakova sets a new national record of 67.07m on her way to winning the women's javelin

Jeremy Wariner clocks a personal best of 43.35 seconds as American athletes take all three medals in the 400m

Kazakhstan's Dmitriy Karpov excels in the 400m to finish the first day of the decathlon in second place behind Smith

In the final event of the evening, China's Liu Xiang pips Terrence Trammell to win the 110m hurdles in 12.95 seconds