Britain's world heptathlon champion Katarina Johnson-Thompson is nominated for the IAAF World Athlete of the Year award.
Governing body the IAAF halves the limit on natural testosterone levels for trans female athletes.
Kenya's Brigid Kosgei eclipses the 16-year-old women's marathon world record held by Britain's Paula Radcliffe as she retains her Chicago title.
Brigid Kosgei claims a new women's marathon world record in Chicago, beating the time set by Britain's Paula Radcliffe in 2003.
Eliud Kipchoge becomes the first athlete to run a marathon in under two hours, beating the mark by 20 seconds.
Mo Farah insists he is one of the world's "most tested athletes" as he faces questions after his former coach was banned.