More Day three photos

Olympic 10,000m champion Kenenisa Bekele unleashed his own sprint finish to defend his world crown in Helsinki.

He took gold from fellow Ethiopian Sileshi Sihine and Kenyan Moses Mosop.

Docus Inzikuru claimed the inaugural women's steeplchase while in the field Kajsa Bergqvist won high jump gold and Ivan Tikhon retained the hammer title.

Women's 100m

American Lauryn Williams betters her Olympic silver medal by claiming the gold in 10.93 seconds.

Pre-race favourite Christine Arron was sluggish out of the blocks and could not find the pace to chase down Williams who powered away.

Arron settles for third as Olympic 200m gold medallist Veronica Campbell comes through to grab silver in a season's best of 10.95.

The Frenchwoman, who clocked 10.98, walks straight off the track as she fails in another attempt to win her first global title.

Bahamian Chandra Sturrup, the fastest woman in the world this year, was disappointing back in fourth.

Men's 10,000m

Kenya's Martin Mathati leads on the penultimate lap ahead ahead of the Ehtiopian trio of Sileshi Sihine, Bekele and Abebe Dinkesa.

Defending world champion Bekele would not have expected to have so many athletes around him as this stage and is forced to work hard.

The Olympic champion kicks for the first time at the top bend but has to keep looking behind his shoulder as the pack continue to threaten.

But Bekele pulls away with his devastating sprint finish - clocking a startling 54.2 seconds on the last lap - to defend his title in 27 minutes 08.33 seconds.

Sihine repeats his Olympic performance by claiming the silver while Moses Mosop of Kenya takes third in a personal best of 27.08.96.

Men's 1500m

Morocco's Adil Kaouch comes through to lead five qualifiers through in the first semi-final.

French title hopeful Mehdi Baala faded badly and makes a shock exit after finishing in eighth.

But those going through to Wednesday's final include Spanish tip Arturo Casado, compatriot Reyes Estevez, Portugal's Rui Silva and Kenyan Alex Kipchirchir.

Bahrain Rashid Ramzi - now the favourite for the title - wins the second semi-final in 3:34.69 after chasing down American front runner Alan Webb, who finishes second.

Britain's Michael East, who has been struggling with injury this season, was not able to emulate his Olympic feat and reach the final.

He was cut adrift at the back of the pack for much of the race and finished back in 11th spot a time of 3:40.27.

The 27-year-old from Portsmouth immediately went to see a doctor, complaining of a stomach upset.

Women's 3,000m steeplechase

Title favourite Docus Inzikuru is predictably ahead after the first 1,000m while Yelena Zadorozhnaya tracks her in second spot.

Poland's Wioletta Janowska is third as the race pans out to form.

Zadorozhnaya's form over the obstacles undermines her running as she is overtaken by team-mate Yekaterina Volvkova and then Jeruto Kiptum.

Inzikuru, who is coached in Italy, is never in danger as she takes the first women's title in 9:18.24 ahead of Volvkova and Kiptum.

Women's 400m

Title favourite Sanya Richards stamps her authority on the first semi-final coming through in a relaxed 50.05 seconds.

But Britain's Donna Fraser is down and out in seventh place, clocking 52.48.

"There are no excuses," Fraser told BBC Sport. "I'm in the best shape I could be but it's not meant to be."

Russia's Svetlana Pospelova led the second semi-final from start to finish to come home in 50.34.

Britain's Christine Ohuruogu finished strongly in fourth but it was too late to go forward to Wednesday's final.

Scotland's Lee McConnell runs a season's best 51.15 in the super quick third semi-final won by Olympic champion Tonique Williams-Darling in 49.69.

Defending champion Ana Guevara remains in the hunt as she eases through in second spot.

Men's hammer

Defending world and Olympic champion Ivan Tikhon fouls his first two attempts but keeps his competition alive with a massive throw of 80.97m to jump into the lead.

The Belarussian betters that at his next attempt, setting a new championship record of 83.89m.

Compatriot Vadim Devyatovskiy lies second with his effort of 82.60m with Szymon Ziolkowski third with a season's best of 79.35m.

Women's High Jump

Sweden's Kajsa Bergqvist fails only one jump on her way to winning gold with a world-leading leap of 2.02m.

American Chaunte Howard, who had stayed with the Swede throughout the competition, failed all three attempts at the same height but takes silver with a best effort of 2.00m.

Sweden's Emma Green claims third after clearing a personal best 1.96m.