Karsten Warholm won a thrilling 400m hurdles race on day six ©Getty Images

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Isaac Makwala was cleared to compete by the IAAF and qualified for the 200m final ©Getty Images
Isaac Makwala was cleared to compete by the IAAF and qualified for the 200m final ©Getty Images
Wayde van Niekerk looked far from assured but still joined Makwala in the semi-final ©Getty Images
Wayde van Niekerk looked far from assured but still joined Makwala in the semi-final ©Getty Images
Mo Farah safely booked his place in the 5,000m final ©Getty Images
Mo Farah safely booked his place in the 5,000m final ©Getty Images
Karsten Warholm stunned the rest of the field to win the 400m hurdles title ©Getty Images
Karsten Warholm stunned the rest of the field to win the 400m hurdles title ©Getty Images
The Norwegian appeared suprised by her own success when he crossed the line ©Getty Images
The Norwegian appeared suprised by her own success when he crossed the line ©Getty Images
Gong Lijiao of China won the women's shot put gold medal ©Getty Images
Gong Lijiao of China won the women's shot put gold medal ©Getty Images
Gong was visibly emotional after producing a podium-topping performance ©Getty Images
Gong was visibly emotional after producing a podium-topping performance ©Getty Images
Shaunae Miller-Uibo of The Bahamas faltered as she appeared destined for victory in the women's 400m ©Getty Images
Shaunae Miller-Uibo of The Bahamas faltered as she appeared destined for victory in the women's 400m ©Getty Images
Phyllis Francis of the United States capitalised on Miller-Uibo's mistake to seal the gold medal ©Getty Images
Phyllis Francis of the United States capitalised on Miller-Uibo's mistake to seal the gold medal ©Getty Images