2017 IAAF World Championships

Sports Illustrated contributing photographer Bob Martin captures the IAAF World Championships in London, England.

2017 IAAF World Championships

IAAF World Championships

IAAF World Championships

Dafne Schippers of Nederlands winning the 200 meter final.

IAAF World Championships

Dafne Schippers of Nederlands winning the 200 meter final.

IAAF World Championships

Ramil Guliyev of Turkey

IAAF World Championships

Wayde Van Niekerk of South Africa

IAAF World Championships

Johannes Vetter of Germany

IAAF World Championships

Great Britain's Men's 4x100 Relay team athletes Chijindu Ujah, Adam Gemili, Daniel Talbot and Nethaneel Mitchell-Blake celebrate winning gold.

IAAF World Championships

Men's Race Walk

IAAF World Championships

Ines Henriques and Hang Yin in the Women's Race Walk

IAAF World Championships

Mike Rodgers, Justin Gatlin, BeeJay Lee and Christian Coleman of the United States, silver, from the mens 4x100 Metres Relay team and Aaliyah Brown, Allyson Felix, Morolake Akinosun and Tori Bowie of the United States from the Women's 4x100 Metres Relay team, gold, celebrate

IAAF World Championships

USA Inika McPherson

IAAF World Championships

Great Britain Mo Farah

IAAF World Championships

Great Britain Mo Farah

IAAF World Championships

Great Britain Mo Farah

IAAF World Championships

Tori Bowie of the United States and Daryll Neita of Great Britain race across the finish line in the Women's 4x100 Metres

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Usain Bolt of Jamaica pulls up injured whilst competing in the 100 metres relay final.

IAAF World Championships

Kevin Mayer (8th R) of France celebrates after the Men's Decathlon 1500 metres.

IAAF World Championships

Kenya Ezekiel Kemboi in action during Men's 3000M Steeplechase at Olympic Stadium in London, England.

IAAF World Championships

Great Britain Mo Farah, Ethiopia Muktar Edris and Ethiopia Yomif Kejelcha in action during Men's 5000M race at Olympic Stadium in London, England.

IAAF World Championships

(L-R) Kenya Cyrus Rutto, Canada Mohammed Ahmed, Bahrain Birhanu Balew, and Ethopia Selemon Barega in action during Men's 5000M race at Olympic Stadium in London, England. USA Paul Chelimo falls down on track.

IAAF World Championships

Ethiopia Etenesh Diro and Turkey Tugba Guvenc in action during Women's 3000M Steeplechase at Olympic Stadium in London, England.

IAAF World Championships

(L-R) USA Phyllis Francis, USA Allyson Felix and Bahrain Salwa Eid Naser in action during Women's 400M Final race at Olympic Stadium in London, England.

IAAF World Championships

USA Allyson Felix

IAAF World Championships

(L-R) USA Justin Gatlin, Jamaica Yohan Blake. USA Christian Coleman and Jamaica Usian Bolt during Men's 100M race at Olympic Stadium in London, England.

IAAF World Championships

Jamaican Usain Bolt in the Men's 100M race at Olympic Stadium in London, England.

IAAF World Championships

USA Justin Gatlin

IAAF World Championships

Justin Gatlin of USA and Usain Bolt of Jamaica

IAAF World Championships

Jamaican Usain Bolt victorious after Men's 100M race at Olympic Stadium in London, England.

IAAF World Championships

USA Christian Coleman (L) wins silver, Justin Gatlin wins gold and Jamaica Usain Bolt wins bronze, victorious after Men's 100M at Olympic Stadium. Bolt with back turned and pointing to Coleman and Gatlin.

IAAF World Championships

Great Britain Jessica Judd in action during Women's 1500M race at Olympic Stadium in London, England.

IAAF World Championships

IAAF World Championships

Overall view of runners in action during Men's Marathon at Tower Bridge in London, England.

IAAF World Championships

Kenya Geoffrey Kirui victorious after winning Men's Marathon at Tower Bridge in London, England.

IAAF World Championships

Ruswahl Samaai of South Africa

IAAF World Championships

South Africa's Luvo Manyonga

IAAF World Championships

Great Britain Mo Farah and Ethiopia Abadi Hadis in action during Men's 10,000M race at Olympic Stadium in London, England.

IAAF World Championships

IAAF World Championships

IAAF World Championships

Mo Farah of Great Britain celebrates winning gold in the Men's 10000 metres final.

IAAF World Championships

Rosangela Santos after she finished second in the Women's 100 Metres Semi Final.

IAAF World Championships

USA Tori Bowie

IAAF World Championships

IAAF World Championships

USA DeAnna Price in action during Women's Hammer Throw at Olympic Stadium in London, England.