Why the running influencer Matt Choi was banned from the New York City MarathonMatt Choi is disqualified from the NYC Marathon and banned for bringing unauthorized e-bike riders which endangered fellow racers.
Watch: Paralympics marathon runner stripped of medal after helping guide with cramp metres from finishElena Congost was disqualified for briefly letting go of her guide's rope, leading to her emotional loss of a potentially won medal.
Algerian boxer who had gender test issue wins first Olympic fight in Paris when opponent quitsImane Khelif won her Olympic boxing match with opponent's early quit due to unclear eligibility concerns.
Olympic champion Mu's appeal denied after fallTrack officials denied Athing Mu's appeal after she fell during the U.S. trials, showcasing the unforgiving nature of the selection process.