Dina Asher-Smith of Great Britain celebrates after winning gold in the women's 200 metres final at the IAAF World Championships in Doha ©Getty Images

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The 23-year-old Londoner looked to be in a class of her own as she sped to a British record of 21.88 ©Getty Images
The 23-year-old Londoner looked to be in a class of her own as she sped to a British record of 21.88 ©Getty Images
Jamaica's Omar Mcleod falls as America's Grant Holloway runs past Spain's Orlando Ortega to win the men's 110m hurdles final ©Getty Images
Jamaica's Omar Mcleod falls as America's Grant Holloway runs past Spain's Orlando Ortega to win the men's 110m hurdles final ©Getty Images
For Holloway victory over Jamaica's Olympic champion marked his first victory in a major Championships ©Getty Images
For Holloway victory over Jamaica's Olympic champion marked his first victory in a major Championships ©Getty Images
Konstanze Klosterhalfen of Germany leads in her heat of the women's 5,000m while a stricken opponent receives medical attention ©Getty Images
Konstanze Klosterhalfen of Germany leads in her heat of the women's 5,000m while a stricken opponent receives medical attention ©Getty Images
Second-placed Andre De Grasse of Canada, the winner Noah Lyles of the United States and third-placed Alex Quiñónez of Ecuador stand on the podium during the medal ceremony for the men's 200 metres final ©Getty Images
Second-placed Andre De Grasse of Canada, the winner Noah Lyles of the United States and third-placed Alex Quiñónez of Ecuador stand on the podium during the medal ceremony for the men's 200 metres final ©Getty Images
Paweł Fajdek of Poland became the first man to win the hammer at four consecutive IAAF World Championships ©Getty Images
Paweł Fajdek of Poland became the first man to win the hammer at four consecutive IAAF World Championships ©Getty Images
The favourite Kevin Mayer of France competes in the men's high jump on the first day of the decathlon ©Getty Images
The favourite Kevin Mayer of France competes in the men's high jump on the first day of the decathlon ©Getty Images
Katarina Johnson-Thompson of Great Britain competes in the women's heptathlon shot put as she finished the opening day in the lead ©Getty Images
Katarina Johnson-Thompson of Great Britain competes in the women's heptathlon shot put as she finished the opening day in the lead ©Getty Images
Chari Hawkins and Kendell Williams of the United States react after competing in the women's heptathlon 100m hurdles ©Getty Images
Chari Hawkins and Kendell Williams of the United States react after competing in the women's heptathlon 100m hurdles ©Getty Images