Novak Djokovic claims there's 'no proof' of doping

Jon Jones dropped from UFC 200 for potential doping

Jose Aldo says Brazilians aren't doping: 'We're the clean ones'

Usain Bolt to lose Olympic gold after teammate caught doping

Athletes caught doping to be banned from Rio Olympics

Probe: More than 1,000 Russian athletes involved in doping

USOC responds to Russian doping scandal

Doping issues cast pall over Olympics

Have UFC and USADA done enough to educate fighters on doping policies?

Maria Sharapova wins first match since doping ban

Novak Djokovic makes controversial remarks on women players

Novak Djokovic upset by Dominic Thiem at French Open

Dickie V breaks down March Madness

Tim Tebow takes batting practice

Miesha Tate on Angela Magana: I wish 'Cyborg' had punched her harder

Half-court, behind-the-back scoop shot

Thunder win game 4, push Warriors to brink

Spring training story lines to watch

NBA weekend in review: Christmas Day excitement

Did United States disappoint in medal count at Winter Olympics?

Djokovic earns landmark win v Hanfmann in Geneva

Djokovic earns landmark win v Hanfmann in Geneva

Genève - Djokovic : "Mon anniversaire ne serait probablement pas le même si je n'avais pas gagné"

Hanfmann close to denying Murray one last Djokovic showdown

Hanfmann close to denying Murray one last Djokovic showdown

Novak Djokovic: World number one’s struggling for form as his grip on the peak of the ATP rankings is beginning to falter

World Cup: Four hungry teams enter semifinals

France, Belgium move on to World Cup semifinals

Top takeaways from first half of MLB season

Fitness model attempting 50 Ironmans in 50 days

Joey Chestnut and Miki Sudo win 2018 Nathan’s Famous Hot Dog Eating Contest

Quarterfinal matches filled with teams looking to make history

Novak Djokovic: "Kalbim sizinle birlikte"

Novak Djokovic's message to his fans after 10th Australian Open victory

Novak Djokovic en pleurs : il craque après son succès à l'Open d'Australie

Novak Djokovic wins record-equalling 22nd grand slam

Australian Open: Serbia's Novak Djokovic to face American Tommy Paul in semifinals

Novak Djokovic