Diamond League: Christine Ohuruogu third in 400m in Doha

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Diamond League athletics: David Rudisha wins 800m

Christine Ohuruogu opened her 2013 Diamond League campaign with a third-place finish in the 400m.

Last year's Olympic silver medallist ran a season-best time of 50.53 seconds but was beaten by Amantle Montsho of Botswana and American Allyson Felix.

Olympic bronze medallist Robbie Grabarz finished fourth in the high jump with a clearance of 2.24m.

David Rudisha, who broke the 800m world record in London, was the evening's star attraction and won his 800m race.

The Kenyan was made to work for the victory however, with Mohammed Aman pressuring him on the home straight before Rudisha powered over the line in a time of 1:43.87.

Britons Michael Rimmer (1:44.97) and Andrew Osagie (1:45.41) finished sixth and eighth respectively.

Ohuruogu ensured it was not a barren evening for Great Britain on the track, as the 28-year-old produced a typically strong final 100m to take overhaul Francena McCorory of the US for third place.

But she could make no serious impression on either Olympic 200m champion Felix or world 400m champion Montsho, who won in 49.88 seconds.

Grabarz could not get his Diamond League campaign off to a winning start, failing at 2.27m in an event won by Bohdan Bondarenko of Ukraine with 2.33m. Fellow Briton Samson Oni cleared 2.19m.

Other British athletes fell short too, with Shara Proctor sixth in the women's long jump with a leap of 6.82m and Jack Green failing to finish in the 400m hurdles.

Elsewhere, Tiffany Porter produced a season's best of 12.74 seconds in the women's 100m hurdles to finish fourth behind Dawn Harper-Nelson of the United States, who won in a world-leading time of 12.60 seconds.

In the men's 100m, last year's Doha winner Justin Gatlin held off compatriot Michael Rodgers and Jamaica's Nesta Carter, the American crossing in 9.97 seconds, with Rodgers and Carter 0.02 seconds behind him.

Shelly-Ann Fraser-Pryce of Jamaica (22.48) and Kenya's Asbel Kiprop (3:31.13) took the women's 200m and men's 1500m respectively.