Kenya's Ruth Chepngetich celebrates winning the first gold medal of the IAAF World Championships in Doha ©Getty Images

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The marathon started at midnight with the runners set on their way by the Emir of Qatar in a race that the winner did not cross the finishing line until after 2.30am ©Getty Images
The marathon started at midnight with the runners set on their way by the Emir of Qatar in a race that the winner did not cross the finishing line until after 2.30am ©Getty Images
The small women's field took part in conditions that were tough even in the middle of the night ©Getty Images
The small women's field took part in conditions that were tough even in the middle of the night ©Getty Images
Before the start of the race the Emir had officially opened the Championships at an event attended by IOC and IAAF Presidents Thomas Bach and Sebastian Coe ©Getty Images
Before the start of the race the Emir had officially opened the Championships at an event attended by IOC and IAAF Presidents Thomas Bach and Sebastian Coe ©Getty Images
Katie Nageotte of the United States competes in the qualifying competition for the women's pole vault with the Doha skyline behind her ©Getty Images
Katie Nageotte of the United States competes in the qualifying competition for the women's pole vault with the Doha skyline behind her ©Getty Images
There was a disappointingly small crowd in the Khalifa International Stadium for the opening night but African fans did their best to make some noise ©Getty Images
There was a disappointingly small crowd in the Khalifa International Stadium for the opening night but African fans did their best to make some noise ©Getty Images
Tunisia's Marwa Bouzayani was among competitors in the women's heats of the 3,000m steeplechase ©Getty Images
Tunisia's Marwa Bouzayani was among competitors in the women's heats of the 3,000m steeplechase ©Getty Images
Guinea-Bissau’s Braima Suncar Dabo stopped near the end of his 5,000m heat to help Aruba's Jonathan Busby, who had collapsed with exhaustion ©Getty Images
Guinea-Bissau’s Braima Suncar Dabo stopped near the end of his 5,000m heat to help Aruba's Jonathan Busby, who had collapsed with exhaustion ©Getty Images
These IAAF World Championships in Doha are the first to take place in the Middle East ©Getty Images
These IAAF World Championships in Doha are the first to take place in the Middle East ©Getty Images
Runners take part in the heats of the men's 5,000m ©Getty Images
Runners take part in the heats of the men's 5,000m ©Getty Images