Daegu Wrap - Day 4: Kirani James, Yuliya Zaripova and David Rudisha

It was a day of surprises in Daegu. Tuesday evening's session delivered stunning upsets and shock performances.

The men's 400m final provided the biggest surprise of the day with defending champion Lashawn Merrit losing out to young Grenadian talent Kirani James. Merritt who entered the final with the fastest qualifying time, lead majority of the race and looked set for victory. However, in a brilliant display of determination James ran down Merrit and edged him at the line.

18 year old James clocked a lifetime best of 44.60, creating history by becoming the first Grenadian to win a world championship medal. Meanwhile 23 year old Belgian Kévin Borlée, who was locked in a battle for bronze with Jermaine Gonzalez, prevailed over the Jamaican. Borlee finished in 44.90

Zaripova wins women's 3000m Steeple Chase
Russia's Yuliya Zaripova upgraded her Berlin silver medal to gold in Daegu. Despite her relative low key season Zaripova effectively put an end to the winning streak of pre-race favourite Milcah Chemos Cheywa. The Kenyan who was unbeaten all season was hoping to give her country the first gold medal in the event. But Zaripova clearly had other plans and dominated the race from the start. By the final lap, Zaripova romped home in in a personal best of 9:07:03. Cheywa now beginning to struggle was passed by Tunisia's Habibiba Ghribi for second with a national record of 9:17:16. The African and commonwealth champion had enough in the tank to hold on for bronze.

Jessica Ennis relegated to 2nd in Heptathlon
Defending champion Jessica Ennis had to settle for  the silver after Russia's Tatyana Chernova smashed her lifetime best to win the Heptathlon with 6880 points. Ennis did put in a valiant effort but it was the javelin that did her in. Up until that point Ennis led convincingly but the Russian turned the tables with a gigantic throw of 52.95 metres. Though Ennis won the final 800m event the damage had already been done. Ennis finished with 6751 points a good 129 points behind the Russian

David Rudisha

Rudisha Triumphs at last
Kenya's two-lap star David Rudisha finally mined gold in the men's 800 metres. Billed as a clash between pre-race favourite Rudisha and Sudanese Abubaker Kaki, the race didn't quite live up to it's hype. Rudisha pretty much lead from start to finish and was never really challenged or pressed. He won in 1:43:91, while Kaki left it too late and had to run extra hard for second in 1:44.41, just barely getting there over Russia's Yuriy Borzakovskiy. Alfred Kirwa Yego, considered a medal contender, finished down the field  in 7th.