Pierce LePage has withdrawn from the Paris Olympics due to a herniated disc in his back which requires surgery.
American Ryan Crouser became the first man to "three-peat" in the Olympic shot put on Saturday.
Images from the World Athletics Championships in Budapest on Saturday.
A summary of Thursday's finals in Track and Field at the Tokyo Olympics.
The 21-year-old stuttered on the penultimate barrier but surged down the home stretch to power across the line and beat her previous record of 51.90 set at the U.S. trials in June.
American Ashton Eaton retained the decathlon world title on Saturday and broke his own world record with a score of 9,045 points.
South African flag-bearer Caster Semenya powered to the 1,500 metres title at the Commonwealth Games on Tuesday, keeping her bid for a golden double at the Gold Coast intact.
American Ashton Eaton won his second straight Olympic decathlon gold medal on Thursday, extending his reign in a sport whose champion earns the title of the world's greatest athlete.
It is the first time every athlete has been disqualified from a heat at a major championships.
Dina Asher-Smith seized her golden opportunity to win the World Championship 200 metres on Wednesday and become the first British woman to claim a global sprint title.
American Ashton Eaton cemented his position as the world's greatest athlete when he won the world decathlon title on Sunday, completing a spectacular hat-trick having won Olympic gold and broken the world record last year.
Images from Thursday's proceedings at the IAAF World Athletics Championships in Doha.
Australia's Sally Pearson completed one of the great sporting comebacks when she overcame two years of injury agony to win the world 100 metres hurdles title at the age of 30.
Ten days of athletics competition at the Rio Olympics begin on Friday. Check out the 10 events not to miss at the Olympic Stadium.
Check out the gold medallists on Day 13 of the 2016 Olympic Games in Rio de Janeiro on Thursday: