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The CAS upheld new IAAF rules which attempt to restrict testosterone levels in female runners such as South Africa's Semenya.
Olympic champion under threat from ruling which would restrict the level of testosterone permitted for female runners.
Meet the Unified Sports teams that are connecting athletes with and without intellectual disabilities.
The Vatican has launched its official track team composed of priests, nuns and Swiss guards.
A euronews reporter accepted the challenge to race 81km through the night, to complete the SaintéLyon, the oldest ultramarathon in France
The career of controversial South African athlete Caster Semenya could be at an end after tougher rules came into effect on Thursday.
Farah aiming for Japan Olympics
Morocco's Rachid El Morabity beat his brother Mohamed finishing in 3hr4mins in stage two of the Marathon des Sables
Father and son team defy cerebral palsy to complete marathons
The decorated sprinter will lace-up his football boots to raise money for UNICEF.
From doping scandals and record breaking transfer fees to comebacks and retirements, 2017 has been packed with action in the world of sport
The IAAF is investigating allegations that the world champion's coach Dennis Mitchell and an agent offered to supply performance-enhancing drugs.
Relations with Washington are in an 'appalling' state, the worst he can recall, says the Russian prime minister.
The world's athletics governing body has maintained Russia's ban on competing in international track and field events as top Russian officials continue to deny operating a doping system.
"If we don’t have faith in what we are watching... then we don’t have a strong sport," says the British marathon champion and anti-doping campaigner.
A scheme to help disabled refugee children resume their lives though sport is taking off in Greece.
The fastest man on Earth vows not to make a comeback as he holds his last press conference as a sprinter.
World's fastest man takes a lap of honour at the London Stadium as US tops the medals table.
Dafne Schippers in the 200m, Brittney Reese in the long jump, and Pawel Fajdek in the hammer: three previous World title holders won gold again on Friday night in London.
Thursday night's action saw fresh upsets on the track in London
There were plenty of thrills on the track in London on Wednesday night
Athletes from Botswana, Canada, Germany and Ireland have been laid low by norovirus at the World Championships in London
Olympic champion and race favourite Omar McLeod shrugged off the defeats of Bolt and Thompson to dominate the Men's 110 metres hurdles final in London.
Like Justin Gatlin's shock victory over Usain Bolt, Tori Bowie's win came at the expense of the Jamaican favourite
Usain Bolt lost the final race of his spectacular career to Justin Gatlin
Justin Gatlin ruined Usain Bolt's farewell party when the 35-year-old American won the world 100 metres title on Saturday, beating the Jamaican superstar into third