World Athletics Championship: day four

Robert Hering reacts after winning his 200m heat. His good day continued as he finished third in his quarter-final with a time of 20.56 and qualified for the semi-finals Photograph: Kerim Okten/EPA

Athletes compete in the second heat of the women's 1,500m Photograph: Phil Noble/Reuters

Blanka Vlasic clears the bar on her way to qualifying for the next round of the high jump Photograph: Christophe Karaba/EPA

Ariane Friedrich celebrates after clearing the bar to make it into the next round of the high jump Photograph: HANNIBAL/EPA

Sylwia Ejdys keeps an eye on the competition as she competes in her 1,500m heat. She qualified for the next round with a time of 4:08:59 Photograph: Christophe Karaba/EPA

Lacena Golding-Clarke, left, Carolin Nytra, centre, and Damu Cherry compete in the first round of the women's 100m hurdles heats. All three qualified for the next round Photograph: Kerim Okten/EPA

Jamaica's Usain Bolt reacts after finishing first in his 200m quarter-final with a time of 20.41 Photograph: Olivier Morin/AFP/Getty Images

Yennifer Frank Casanas competes in the discus heats but his best throw of 61.10m wasn't good enough and he missed out on qualifying for the next round Photograph: Robert Ghement/EPA

Ricardo Chambers and Jeremy Wariner sprint round the bend on their way to qualifying from their 400m round one heat Photograph: Fabrice Coffrini/AFP/Getty Images

Sanya Richards, third right, celebrates as she crosses the line to win gold in the women's 400m final Photograph: Olivier Morin/AFP/Getty Images

There were different emotions for Antonina Krivoshapka and ... Photograph: Kerim Okten/EPA

Christine Ohuruogu after the race as they contemplate their defeat Photograph: Alexander Hassenstein/Bongarts/Getty Images

Phillips Idowu sets a personal best of 17.73m in the men's triple jump final and no one else could match it so Idowu took gold Photograph: Stu Forster/Getty Images